1. A question about why a behavior occurs relates to _ultimate causation_.
2. A(n) _learned behavior_ is shaped by experiences.
3. If an animal's experience during development does not influence a response, the response is most likely a(n) _innate behavior_.
4. A fixed action pattern is an example of _innate behavior_.
5. A(n) _learned behavior_ can vary widely within a species.
6. A scientist who questions the evolutionary history that a given behavior relates to is investigating its _ultimate causation_.
7. An action that is observed in embryos is a(n) _innate behavior_.
8. A scientist examining the mechanism of a particular behavior is studying _proximate causation_.
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10. What is the function of the protein labeled A?
11. Draw an arrow pointing to the area of the phospholipid bilayer where you
are least likely to find water (hydrophobic, nonpolar section).
12. If the molecules labeled B are glucose moving from high concentration to
low concentration, what type of cell transport is occurring?
B
(Look at the picture)
Answer:
Blood cells
Explanation:
Cell produced through hematopoiesisWhat is the main difference between fetal and adult hemoglobin?
The main difference between fetal and adult hemoglobin is in the types of subunits that make up each protein.
Hemoglobin is a protein found in red blood cells that is responsible for carrying oxygen throughout the body. Fetal hemoglobin is made up of two alpha subunits and two gamma subunits, while adult hemoglobin is made up of two alpha subunits and two beta subunits.
The presence of gamma subunits in fetal hemoglobin makes it able to bind oxygen more tightly than adult hemoglobin, allowing the fetus to obtain oxygen from the mother's bloodstream more efficiently. Additionally, the production of fetal hemoglobin decreases after birth, while the production of adult hemoglobin increases.
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what substances that cause facilitation of a neuron ____________________________.
There are several substances that can cause facilitation of a neuron, including neurotransmitters like dopamine, serotonin, and acetylcholine.
These substances act on specific receptors on the neuron, leading to an increase in activity and communication between neurons. Additionally, some drugs like caffeine and amphetamines can also cause facilitation of neurons by increasing the release of neurotransmitters or blocking their reuptake. Overall, facilitation of neurons is an important process in neural communication and can have significant effects on behavior and cognition. Norepinephrine is a neurotransmitter that can act as either an excitatory or inhibitory neurotransmitter, depending on the receptor to which it binds.
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ascorbic acid acts as a coenzyme and is essential for the production of
Ascorbic acid acts as a coenzyme and is essential for the production of Collagen.
Ascorbic acid, also known as vitamin C, is an essential nutrient that the body needs for many different functions. One of its important roles is as a coenzyme, which means it helps enzymes perform their functions in the body. Enzymes are proteins that help speed up chemical reactions in the body, and ascorbic acid helps these enzymes work more efficiently.
Ascorbic acid is essential for the production of collagen, a protein that is a major component of connective tissue. Collagen is important for maintaining the strength and elasticity of skin, cartilage, tendons, and other tissues. Ascorbic acid is also involved in the synthesis of neurotransmitters, which are chemicals that transmit signals between nerve cells in the brain.
Overall, ascorbic acid is an important nutrient that plays many different roles in the body. Its functions as a coenzyme and antioxidant are essential for the production of collagen and neurotransmitters, as well as for protecting the body against free radicals.
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what is added to a gel that allows us to visualize dna?
To visualize DNA in a gel, a fluorescent dye called ethidium bromide (EtBr) or a safer alternative like SYBR Safe is added. These dyes intercalate between the DNA base pairs, and when exposed to UV light, they emit a visible fluorescence.
This allows us to see the DNA bands within the gel after electrophoresis, making it easier to analyze the DNA fragments. Ethidium bromide and SYBR Safe are commonly used fluorescent dyes in DNA gel electrophoresis. These dyes intercalate between the DNA base pairs, causing a shift in the absorption spectrum of the DNA molecule. When exposed to UV light, the dye-DNA complex fluoresces, emitting a visible light that can be captured by a camera or observed directly. The DNA bands in the gel appear as bright bands against a darker background, allowing for easy visualization and analysis. While ethidium bromide is widely used, SYBR Safe is a safer alternative because it is less toxic and non-carcinogenic.
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1. Which must be true to receive government flood insurance?
○The home must be built on a flood plain.
○The city must take steps to reduce flood damage.
○The area must flood less than once every 100 years.
○ There must be more than $200,000 of damage.
To receive government flood insurance, the following must be true:
○ The city must take steps to reduce flood damage.
In the United States, this is managed by the National Flood Insurance Program (NFIP), which is administered by the Federal Emergency Management Agency (FEMA). To be eligible for flood insurance through the NFIP, a community must participate in the program and adopt and enforce floodplain management regulations to reduce the risk of flood damage. These regulations ensure that new development and substantial improvements to existing structures in the community are designed and constructed to minimize flood damage.
high biodiversity leads to a healthy ecosystem because
High biodiversity leads to a healthy ecosystem because it promotes stability, productivity, and resilience.
High biodiversity contributes to a healthy ecosystem in multiple ways. First, it ensures the stability of the ecosystem by distributing the functions of different species across a wide variety of niches. This reduces the risk of collapse if a single species becomes extinct or its population drastically declines. Second, a diverse ecosystem is more productive because various species contribute to more efficient use of available resources. Third, high biodiversity also leads to greater resilience. When faced with environmental challenges such as climate change, pollution, or disease, a diverse ecosystem can better adapt and recover, as some species may possess the traits necessary to survive and maintain the overall health of the ecosystem. Overall, high biodiversity is essential for the long-term health, stability, and sustainability of an ecosystem.
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The neural plate is induced by the notochord to form a:________
The neural plate is induced by the notochord to form a neural tube.
The neural plate is induced by the notochord to form a neural tube because
1. The notochord, a rod-like structure, forms during early embryonic development.
2. The notochord releases signaling molecules that induce the formation of the neural plate, a flat sheet of cells.
3. The neural plate then undergoes a process called neurulation, during which it folds and fuses to form the neural tube.
4. The neural tube eventually gives rise to the central nervous system, including the brain and spinal cord.
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What are the problems with a cell becoming too large? (Choose all that apply).
Group of answer choices
DNA is overloaded
The volume increases faster than the surface area causing the cell to possibly burst.
The surface area increases faster than the volume causing the cell to possibly burst.
Nutrients and materials are hard to pass throughout the cell.
There is more room for materials to pass because the cell is bigger.
Less efficient
More efficient
Cell ratio of SA:V does not affect the cell.
Hinders cell-cell communication
Answer:
DNA is overloaded
The volume increases faster than the surface area causing the cell to possibly burst
Nutrients and materials are hard to pass throughout the cell
Less efficient
Hinders cell-cell communication
one of the biggest threats to plants as they evolved on land was the
One of the biggest threats to plants as they evolved on land was the lack of water and the need to adapt to a variety of environmental conditions, such as changes in temperature, sunlight, and nutrient availability.
The colonization of the land was a significant development for plants. Virtually all life had developed in the water up until that point. Dry land was a completely distinct environment. The dryness was the main issue. It was really difficult to just take in enough water to survive. Early plants were kept tiny and close to the ground by it. In order for sperm to swim to eggs, sexual reproduction also required water. In addition, it was always shifting and extremely hot on land. Additionally potent and harmful was the sun. It increased the chance of mutation for land organisms. One of the biggest threats to plants as they evolved on land was the lack of water. As they transitioned from aquatic environments to terrestrial environments, they had to adapt to survive in drier conditions. This led to the development of roots, leaves, and other structures that help them absorb and retain water. However, even with these adaptations, plants still face threats from drought, excessive heat, and other environmental factors that can limit their growth and survival.
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pls helppp!! Which is the first oxygen-producing organism?
Answer:
cyanobacteria first evolved
Explanation:
According to certain experts, it is believed that cyanobacteria originated around 2.4 billion years ago.
What three genera of bacteria can perform lysine deamination?
The three genera of bacteria that are capable of performing lysine deamination are Proteus, Providencia, and Morganella.
Lysine deamination is a biochemical process in which lysine, an amino acid, is converted into a different compound by the removal of its amine group (-NH2). This reaction is typically catalyzed by enzymes called lysine deaminases, which are found in various organisms including bacteria. There are several genera of bacteria that have been shown to possess lysine deaminase activity.
However, the three most well-known genera are: 1. Escherichia: This is a genus of Gram-negative bacteria that are commonly found in the human gut. Many strains of E. coli, in particular, are known to produce lysine deaminase. 2. Proteus: Proteus is another genus of Gram-negative bacteria that are often found in soil, water, and animal guts. Some species of Proteus, such as P. vulgaris and P. mirabilis, have been shown to possess lysine deaminase activity. 3. Morganella: Morganella is a genus of Gram-negative bacteria that are closely related to Proteus. Like Proteus, some species of Morganella have been found to produce lysine deaminase.
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why did thomas hunt morgan choose drosophila for his genetics experiments?
Thomas Hunt Morgan selected Drosophila (fruit flies) for his genetics experiments due to several reasons. One of the main reasons was that Drosophila are small, easy to rear in a laboratory, and have a short lifespan.
This allowed Morgan to study several generations in a short amount of time.
It also have a small number of chromosomes (eight), which are easily visible under a microscope, allowing Morgan to study how genes are transmitted from one generation to the next and their arrangement on chromosomes.
Morgan's work with Drosophila laid the foundation for modern genetics and earned him the Nobel Prize in Physiology or Medicine in 1933.
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WHAT FACTOR OR FACTORS ARE CONSIDERED WHEN A CELL CULTURES ENVIROMENT IS MADE AS SIMILAR AS POSSIBLE TO A CELL'S NATURALS SURROUNDINGS
The nutrition, pH and the temperature of the cells are the important parameters to consider.
What is the cell?We know that the cell is the simplest unit of life. When we talk about the cell, our minds should go the building blocks of life in the organism. The cells that we have in the organism come together to ensure life continues.
While creating a cell culture environment that is as comparable to a cell's natural environment as feasible, several elements are taken into account, including:
Temperature: The culture should be kept at a temperature that is comparable to what the body experiences, usually around 37°C.
pH: The culture's pH should be kept within the body's normal range, which is normally between 7.2 and 7.4.
Nutrition: All the nutrients essential for cell growth, including amino acids, vitamins, and minerals, should be present in the culture medium.
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40. the space that occurs between opposing occlusal surfaces during mandibular protrusion is known as:
The space that occurs between opposing occlusal surfaces during mandibular protrusion is known as the anterior open bite.
Anterior open bite is a type of malocclusion that is characterized by a space between the upper and lower front teeth when the jaw is in a protruded position. This means that when the lower jaw is pushed forward, the upper and lower teeth do not meet properly.
This condition can occur due to a variety of factors, including genetics, thumb sucking, tongue thrusting, and prolonged pacifier use. In some cases, it can cause difficulty with speech, chewing, and biting, and can also lead to cosmetic concerns. Treatment options for anterior open bite may include orthodontic intervention, jaw surgery, or a combination of both.
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Blood flows from the renal artery to the ______ arteries in the area of the renal sinus.
Blood flows from the renal artery to the interlobar arteries in the area of the renal sinus. To explain in detail, the renal artery branches into smaller vessels called the interlobar arteries as it enters the kidney through the hilum. These interlobar arteries then travel through the renal columns and into the renal cortex. At the border between the cortex and the medulla, they branch into arcuate arteries which run parallel to the base of the renal pyramids. The arcuate arteries give rise to smaller interlobular arteries which extend into the cortex and supply the nephrons with oxygenated blood. In the area of the renal sinus, the interlobular arteries may be referred to as the intrarenal arteries as they continue to branch and supply blood to the other structures within the kidney, such as the collecting ducts, renal pelvis, and calyces.
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Iron deficiency is the most common form of anemia. what role does iron play in the health of red blood cells?
Iron plays a crucial role in the health of red blood cells. It is an essential component of hemoglobin, the protein responsible for binding and transporting oxygen in the bloodstream.
When there is an iron deficiency, the production of hemoglobin is reduced, resulting in a lower number of functional red blood cells. Consequently, the body's ability to transport oxygen to various tissues and organs is compromised, leading to symptoms associated with anemia. Ensuring an adequate intake of iron is vital for maintaining healthy red blood cells and preventing anemia.
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in the signal transduction pathway seen here, how many active erk molecules can be produced once the receptor is activated?
In the signal transduction pathway, once the receptor is activated, multiple molecules of active erk can be produced.
The exact number may vary depending on the specific pathway and the intensity of the signal received. A variety of events are started by the activated receptors. The kinase Raf is activated by these events. MEK is phosphorylated and activated by active Raf, and ERKs are phosphorylated and activated by MEK. Numerous target molecules are phosphorylated and activated by the ERKs. The majority of the time, though, the response is a resounding no! The signal must be transmitted to receptors on the cell membrane via other molecules within the cell, sort of like a cellular game of "telephone."
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During embryonic development, clusters of cells called _______ secrete morphogens.
During embryonic development, clusters of cells called organizer cells secrete morphogens.
These morphogens play a crucial role in the development of the embryo, as they help to determine the fate of neighboring cells by controlling gene expression and signaling pathways. The precise nature and timing of morphogen secretion is carefully regulated, and any disruptions to this process can have significant consequences for the developing organism. Overall, understanding the role of morphogens and organizer cells in embryonic development is critical for advancing our understanding of how complex organisms develop and evolve over time.
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a hollow area within the kidney that contains blood vessels, nerves, lymphatic vessels and urine-collecting structures is called the renal medullary_____.
A hollow area within the kidney that contains blood vessels, nerves, lymphatic vessels, and urine-collecting structures is called the renal medullary pyramid. The renal medulla is the innermost part of the kidney, composed of several pyramidal structures known as the renal medullary pyramids.
The renal medulla is responsible for filtering urine from the blood and reabsorbing the necessary nutrients and water to maintain proper bodily functions. The renal medullary pyramids contain a network of nephrons, which are the functional units of the kidney that filter blood and produce urine. The urine produced by the nephrons then drains into the renal pelvis, a funnel-shaped structure located at the base of the renal medulla, which then carries it to the bladder. The renal medullary pyramid is surrounded by the renal cortex, which is the outer layer of the kidney that contains the glomeruli, the blood vessels responsible for filtering the blood in the initial stages of urine production.
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Your friend has invited you onto her family’s boat for a day of fishing. After lunch on the boat, your friend wants to throw a bag of trash overboard. After researching the impact currents have on objects, explain what you would do in this situation and why.
what was it important for paine to record the number of different species as well as the overall number of animals on the rock outcrop?
It is important for Paine to record the number of different species as well as the overall number of animals on the rock outcrop so he would know what changed.
The biggest collection of creatures in which any two individuals of the right sexes or mating types may conceive a viable child, usually by sexual reproduction, is referred to as a species. It is a unit of biodiversity as well as the fundamental categorization and taxonomic rank of an organism. A species can also be identified by its karyotype, DNA sequence, appearance, behaviour, or ecological niche. In addition, since fossil reproduction cannot be studied, palaeontologists employ the chronospecies idea.
The two-part designation "binomial" is given to every species (with the exception of viruses). The genus to which the species belongs is the first component of a binomial. The second component is referred to as the particular name or epithet.
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microtubules can grow by addition of tubulin dimers to ______ , and they can shorten by removal of dimers from ______.
Microtubules can grow by addition of tubulin dimers to the plus end, and they can shorten by removal of dimers from the plus end.
Microtubules can grow by the addition of tubulin dimers to the plus end, which extends the length of the microtubule. This process is called polymerization or assembly. Conversely, microtubules can also shorten by the removal of tubulin dimers from the plus end, which reduces the length of the microtubule. This process is called depolymerization or disassembly.
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what features might we expect the mitochondria and chloroplasts in eukaryotic cells to contain if these organelles were the result of endosymbiosis of bacterial cells?
Required features are mitochondria and chloroplasts resulted from endosymbiosis of bacterial cells, we would expect these organelles to contain circular DNA, double membranes, ribosomes, similar size and shape to bacterial cells, and reproduce by binary fission.
If mitochondria and chloroplasts in eukaryotic cells were the result of endosymbiosis of bacterial cells, we might expect these organelles to contain features such as:
1. Circular DNA: Since bacterial cells contain circular DNA, we would expect mitochondria and chloroplasts to have their own circular DNA, separate from the linear DNA in the cell nucleus.
2. Double membranes: Both mitochondria and chloroplasts would have double membranes, as a result of the engulfment of the bacterial cells by the host eukaryotic cell. The inner membrane would be from the original bacterial cell, while the outer membrane would be from the host cell.
3. Ribosomes: Mitochondria and chloroplasts would have their own ribosomes, similar to those found in bacteria, for protein synthesis.
4. Similar size and shape: The size and shape of these organelles would resemble that of bacterial cells, as they were once free-living bacteria.
5. Reproduction by binary fission: Both mitochondria and chloroplasts would reproduce independently from the host cell through a process similar to bacterial binary fission.
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does anyone know how common depression is? and how has the number of cases changed over time? for a bio report :)) please help!!
Answer:
Explanation:
Depression is a common and serious medical illness that negatively affects how you feel, the way you think and how you act. It can lead to a variety of emotional and physical problems and can decrease your ability to function at work and at home.
Depression symptoms can vary from mild to severe and can include:
Feeling sad or having a depressed mood
Loss of interest or pleasure in activities once enjoyed
Changes in appetite — weight loss or gain unrelated to dieting
Trouble sleeping or sleeping too much
Loss of energy or increased fatigue
Difficulty thinking, concentrating, making decisions
Restlessness or feeling slowed down
Feeling worthless or guilty
Depression symptoms must last for at least two weeks to be considered a diagnosis.
Depression is one of the most common mental disorders in the world. According to the World Health Organization (WHO), more than 264 million people suffer from depression, which is about 4.4% of the world's population.
The number of cases of depression has been increasing over time. In the United States, for example, the prevalence of depression has increased from 9.5% in 1990 to 16.6% in 2017.
The following events elicit an antibody response. What is the third step?
A) Antigen-digest goes to surface of APC.
B) APC phagocytizes antigen.
C) B cell is activated.
D) TH cell recognizes antigen-digest and MHC II.
E) TH cell produces cytokines.
The correct order of the steps that elicit an antibody response is as follows:
Antigen is presented to an Antigen-Presenting Cell (APC).The APC phagocytizes (engulfs) the antigen and digests it into smaller peptides.The T-helper (TH) cell recognizes the antigen peptides presented by the APC in the context of Major Histocompatibility Complex class II (MHC II) molecules on the surface of the APC.The activated TH cell produces cytokines, which stimulate the B cells to differentiate into plasma cells.The plasma cells secrete antibodies that recognize and bind to the antigen, neutralizing it and marking it for destruction by other immune cells.
Therefore, the third step in the process of eliciting an antibody response is that the TH cell recognizes the antigen peptides presented by the APC in the context of MHC II molecules on the surface of the APC.
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which monosaccharide found in the blood has its concentration regulated by the hormones insulin and glucagon?
Answer:
I believe the answer is Glucose
Explanation:
Glucose, a monosaccharide, is the human body's primary energy source. It is used by the liver and other cells for energy or stored as glycogen for later use. Glucose levels in the bloodstream are regulated by two pancreatic hormones, insulin, and glucagon.
The monosaccharide found in the blood, whose concentration is regulated by the hormones insulin and glucagon, is glucose. Glucose is a simple sugar that serves as the primary source of energy for the body's cells.
Glucose is obtained from the digestion of carbohydrates in the food we consume and is transported to the cells via the bloodstream.
Insulin and glucagon play crucial roles in maintaining glucose homeostasis, ensuring a stable and constant glucose concentration in the blood. Insulin, produced by the beta cells of the pancreas, is released when blood glucose levels are high, such as after a meal. It promotes the uptake of glucose by cells, particularly in the liver and muscles, and stimulates the conversion of glucose to glycogen for storage. This process reduces blood glucose levels back to the normal range.
In contrast, glucagon is released by the alpha cells of the pancreas when blood glucose levels are low, such as during fasting or between meals. Glucagon stimulates the breakdown of glycogen stored in the liver and muscles, converting it back to glucose. This glucose is then released into the bloodstream to raise blood glucose levels back to the normal range.
Together, insulin and glucagon work in a complementary manner to ensure that blood glucose levels remain within the desired range, providing a consistent energy supply for the body's cells and maintaining overall metabolic balance.
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A type of algae encased within a cell wall made of silica; most are single-cell, but many can form colonies.a. trueb. false
The statement "A type of algae encased within a cell wall made of silica; most are single-cell, but many can form colonies" is true. This type of algae is known as diatoms and they are characterized by their unique cell wall made of silica. While most diatoms are single-celled, they can also form colonies.
Diatoms are microscopic, single-celled organisms belonging to the phylum Bacillariophyta. These algae are unique because their cell walls are composed of silica, making them quite rigid and strong. This characteristic silica cell wall is also known as a frustule.
While most diatoms are single-celled, they can also form colonies through various modes of colony formation, such as by sticking together via mucilage secretions, forming chains, or creating star-like structures. These colonies enable diatoms to survive and adapt to various environmental conditions.
Overall, diatoms play a crucial role in aquatic ecosystems, serving as primary producers and contributing to the global carbon cycle.
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how do a ribosome, a mrna, a SRP, a polypeptide, and a rough endoplasmic reticulum relate?
The protein synthesis process involves the ribosome, messenger RNA (mRNA), signal recognition particle (SRP), polypeptide, and rough endoplasmic reticulum (RER).
How do ribosome, mRNA, SRP, Polypeptide, and rough endoplasmic reticulum relate with each other?
The genetic information is transferred from the DNA in the nucleus to the ribosome in the cytoplasm by the mRNA, which acts as a template for the production of proteins.
In a process known as translation, the ribosome reads the mRNA and uses it as a template to create a polypeptide chain.
Getting newly synthesized polypeptide chains to the RER for further processing relies heavily on the SRP.
The translation process is halted until the ribosome can be transported to the RER because it binds to a particular signal sequence on the polypeptide chain.
The RER has a rough appearance because it is a membrane-bound organelle that is dotted with ribosomes.
Newly synthesized proteins, particularly those destined for secretion or membrane insertion, are processed and modified by it.
The ribosome creates the polypeptide chain by threading it through a channel in the RER membrane, where enzymes and chaperones further modify it.
In a nutshell, the ribosome reads the messenger RNA and creates a polypeptide chain that the SRP recognizes and binds.
The ribosome is directed to the RER by the SRP, where the polypeptide chain undergoes additional modification and processing before being transported to its final destination.
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In the 1800s Gregor Mendel published a scientific paper based on pea plant experiments. In the paper he made the following conclusion: Traits have two
possible forms, which are determined by the inheritance of two factors. One factor is inherited from each parent. One form of the trait is dominant and the
other recessive. When the offspring inherit one or more dominant factors, they will display that form of the trait.
Since Mendel's paper was published, other forms of inheritance have been discovered. Describe two examples of how Mendel's conclusion does not fully
explain the current scientific understanding of inheritance.
Mendel's conclusion does not fully explain the current scientific understanding of inheritance in the area of Polygenic inheritance.
What is Mendel?The foundation of Mendel's research was features that were governed by a single gene. But many features are governed by a number of genes, each of which only makes a minor contribution to the phenotype. The term "polygenic inheritance" describes this.
Human height, for instance, is influenced by a variety of genes, each of which only slightly affects an individual's total height. Because there are so many different possible allele combinations, it is significantly more challenging to predict the phenotype of the offspring solely on the genotype of the parents.
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