In chickens, comb shape is determined by genes at two loci (R, r and P, p). A walnut comb is produced when at least one dominant gene R is present at one locus and at least one dominant gene P is present at a second locus (genotype R_ P_). A rose comb is produced when at least one dominant gene is present at the first locus and two recessive genes are present at the second locus (genotype R_ pp). A pea comb is produced when two recessive genes are present at the first locus and at least one dominant gene is present at the second (genotype rr P_). If two recessive genes are present at the first and the second locus (rr pp), a single comb is produced. Give genotypes for comb shape of the parents in the following cross: Rose crossed with pea produces 20 walnut offspring.

a. RR PP × rr pp
b. RR Pp × rr pp
c. Rr PP × rr pp
d. Rr Pp × rr pp
e. Rr pp × rr pp

Answers

Answer 1

Answer:

in the obtained options, there is no dominant gene for the crossed pairs, therefore, no answer would be correct, however, when assigning a dominant character to the P gene, the correct answer would be:

E. Rr pp *rrPp

Explanation:

According to the information obtained we deduce:

Comb shape is produced by R and P

Comb of walnuts with an R or a P

Pink comb: 1 dominant P and R at the first locus and 2 recessive at the next locus

Pea comb: 2 recessive at the start and one dominant in the next position

1 single comb: 2 recessive at both loci

Rr pp × rr Pp will produce from the interbreeding: 2 walnuts, 1 single and 1 pea offspring.

We deduce that for the pink comb the genotype is: Rrpp

and for the pea comb it is rrPp

Rr pp × rr Pp generates crosslinks containing RrPp, rrPp, rrpp as children in a 2: 1: 1 ratio.


Related Questions

How do organims form carbon films

Answers

Answer:

Organisms form carbon film when sediments cover the organisms and decay of organisms form hollows.

Explanation:

Answer:

Organisms form carbon film when sediments cover the organisms and decay of organisms form hollows.

When an organism is covered by sediment, it begins to decay. When decaying, the organisms release a gas. This process in turns leaves a thin film of carbon that preserves parts of the organisms.

(Hope this helps) Sky

What is the great pacific garbage patch

Answers

Answer:

The Great Pacific Garbage Patch is a 1.6 million kilometer long patch of garbage on the ocean. It is about three times the size of France and twice the size of Texas. It is an area on the surface where garbage has gathered form all over, it is extremely difficult to try and cleanup, because the water's gyres drag the pollution all over the ocean and dump it onto coastlines, shores, habitats, coastal reefs, and even deep into the oceans. Scientists are trying to solve this enviormental issue everyday and are brainstorming new ideas to solve this giant problem.

Answer:

The Great Garbage Patch is a area in the Pacific Ocean that is twice the size of  Taxes that is all trash. It is also known as the Pacific trash vortex. It is killing our marine life. Sea aminals like turtles and fish are mistaking the trash for food and eating it. It can also be troubling the human life too. Since we eat sea food we are eating the things they are eating.

Explanation:

I just learned it.

As a conservationist, what are your top three concerns regarding the hydroelectric dam and the biodiversity of the region?

Answers

Answer:

I’m concerned about how the dam will affect the water flow in the river, which can affect the behaviors of fish. I’m also concerned that some fish and aquatic animals might get sucked into the dam. Finally, I worry that the dam could malfunction and cause flooding, which could damage the ecosystem.

Explanation:

Top three concerns regarding the hydroelectric dam and the biodiversity of the region

Hydropower can also cause environmental and social problems. Reservoirs drastically change the landscape and rivers they are built on. Dams and reservoirs can reduce river flows, raise water temperature, degrade water quality and cause sediment to build up. This has negative impacts on fish, birds and other wildlife.

How do hydroelectric power plants affect the environment?

Hydroelectric plants alter the natural habitats of freshwater species in the areas they are located. It changes the concentration of nutrients, water temperature, and the river's flow. Downstream river flow suffers a loss of water and silt loads, reducing water quality.

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Genes are responsible for:
A.
all preferences of an organism.
B.
no traits of an organism.
C.
all traits of an organism.
D.
all inherited traits of an organism.

PLEASE HELP

Answers

Answer:

C. All traits of an organism

Before dna was discovered in which materials did scientists think the genetic materials was stored?

Answers

Answer: Proteins

Explanation:

Answer:

Proteins

Explanation:

Select the correct answer.
Why are kelp and seagrass not found in deep oceanic water?

Answers

Answer:

There is no sunlight/light in deep ocean waters, therefore the plants cannot grow.

Explanation:

Answer:

B) There’s no availability of sunlight

Explanation:

I just took a test with this question on it and got it right.

Hope this helps! :)


Check all the boxes where the vocabulary word correctly matches its
science definition?
Equilibrium: a system where forces are in balance
O
Climax community: the end of a succession resulting in a stabilized community
o
Succession: the act of winning in life
Primary Succession: colonization of an area that has not been previously occupied by
a community, e.g. newly exposed rock
Pioneer Species: the first organisms to live on rocky surfaces, e.g. lichens, moss,
algae, and fungi
Secondary Succession: colonization following a major disturbance, such as a fire or a
flood

Answers

Answer:

Climax community, primary succession, pioneer species, secondary succession.

Explanation:

Equilibrium with regards to succession occurs as "a state of dynamic equilibrium in a community of organisms in which genetic, species and ecosystem diversity remain relatively stable, but this factors are subject to gradual changes through natural succession."

Succession: the process by which the structure of a biological community evolves over time.

What did the "War Guilt Clause"
do to Germany after World War I?
A. It put the blame on Germany for World War I.
B. Germany would not be responsible for any
war debts.
C. It listed Germany as being part of the Black
Hand.
D. Germany would now be part of the Allied
Powers.
Corporation. All Rights Reserved.

Answers

Answer: D

Hopefully this help


How are oceans directly affected by increased carbon dioxide concentrations in the atmosphere?​

Answers

Answer:

the acidity of the ocean would increase

Hope this helps!

During summer in the Northern Hemisphere,
A.
the Sun rises earlier and sets later than during other seasons.
B.
the Sun appears lower in the sky than during other seasons.
C.
there are fewer hours of visible sunlight each day than during other seasons.
D.
the Sun rises in the Southeast and sets in the Southwest.

Answers

Answer:

A

Explanation: In the summertime in the northern hemisphere, the Earth is farther from the Sun because of the ellipse in its orbit, but the angle of the Earth's tilt points the hemisphere towards the Sun, making the days longer. The Sun's angle is also higher during the summer months than the winter months.

Answer:

A

Explanation:

Study Island

A population of lab rats recently escaped into the sewer system of Washington, D.C. A brave researcher sampled this population and estimated the following phenotypic frequencies, which were caused by a single gene with two alleles: E and e. 61% normal eyes (EE) 26% cross-eyed (Ee) 13% blind (ee) a) If this population were to reach a Hardy-Weinberg equilibrium (HWE) in one generation, what would the phenotypic frequencies be in that new HWE generation

Answers

Answer:

the population has a Hardy-Weinberg equilibrium

Explanation:

According to the case and the information given, the genotype frequencies are:

EE (p2) = 0.61

Ee (2pq) = 0.26

ee (q2) = 0.13

To obtain the allele frequencies we can perform the following equation

Frequency of E = p = p2 + 1/2 (2pq) = 0.61 + 1/2 (0.26) = 0.61+ 0.13 = 0.74

replacing the data we obtain:

Frequency of e = q = 1- p = 1 - 0.74 = 0.26

Regarding the expected frequencies of the genotype, taking into account that there is a Hardy-Weinberg equilibrium:

EE (p2) = (0.74) 2 = 0.547

Ee (2pq) = 2 × (0.74) (0.26) = 0.384

ee (q2) = (0.26) 2 = 0.067

We know that: (p² + 2pq + q² = 1)

replacing with the obtained data:

0.547 + 0.384 + 0.067 = 0.998 ~ 1

finally we can affirm that the population has a Hardy-Weinberg equilibrium

50 points. ANSWER FAST FOR BRAINIEST. Why is the human body a system of interacting subsystems
composed of a group of specialized cells and tissues? (please use detail and be very specific!) this is supposed to be an essay but please just give me the main points/ the most important info!
I give brainiest and thanks! appreciate it :) SCIENCE

Answers

Answer:

Explanation:

In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.

4. Does simple diffusion require an input of energy?

Answers

Answer:

no

Explanation:

Simple diffusion does not require energy or need the assistance of a transport protein. Other larger or charged molecules that diffuse across a membrane may need assistance from a protein.

What are the most useful bones for determining biological sex, and age of a skeleton? Answer each one individually, they are not necessarily the same bones.

(Forensics)

Answers

Answer:

The human pelvis Is use for determining sex of skeletal remains. The woman pelvis provide optimal space for birth canal which is shown in the morphology and relationship of it's different part. Skull is also use.

The fourth ribs is use for determining the age of skeletal remains.

Explanation:

The human pelvis is use to determine the biological sex of skeletal remains. The woman pelvis is wider than man's and it provide space for birth canal.

The fourth ribs is use to estimate the age of skeletal remains as the cartilage between the ribs and sternum gradually turn as time goes on. The features of the head can also be use to estimate the age of skeletal remains.

BTW I NEED THIS ASAP what words can i add to make a word with trait variation?

Answers

Answer:

artist, strait, air, art, at...

Explanation:

Which types if the following sets of phenotypes describes James P. Sullivan?
A. Has two horns, two legs, and blue &purple fur
B. Has no legs, yellow eyes, and green fur
C. Has no fur, eyes on stalks, and spikes on back
D. Has clawed toes, three eyes, and blue &purple fur

Answers

The A) has two horns

The mass of an object doubles. What happens to the gravitational force between it and another object whose mass stays the same, assuming they remain the same distance apart?

Answer is the amount of the gravitational force doubles.

I do not understand this. Can someone explain it to me? Thank you.

Answers

Answer:

When they double the force of gravity quadruple.

Explanation:

(:

There is little food available in ecosystems found near polar ice. True or false

Answers

Answer:

false

Explanation:

edge 2021

Which is an example of mechanical weathering

Answers

Answer:

Examples of mechanical weathering include frost and salt wedging, unloading and exfoliation, water and wind abrasion, impacts and collisions, and biological actions.

Explanation:

salt!! :)

hope this helped c:

All BUT ONE is a reason why environmentalists question biofuels as sustainable energy resources.
A) The production of certain biofuels consumes more water than any type of fuel energy.
B) Large-scale biofuel production would divert land from producing food needed to feed the world.
C) Reduction in greenhouse gas emissions drastically reduces the carbon footprint of a combustible fuel.
D) Biofuel production can result in habitat loss and increased invasive species, especially if crop production replaces native forest.

Answers

Answer:

C.

Explanation:

The question states it is looking for a reason that supports biofuels instead of questioning them and all but C. explain that biofuels may not be a good energy source, so the answer is C

Given the following evidence; which does not support the theory of Continental Drift? A) climate
B) fossils of plants and animals
C) magnetic strips in the ocean floor
D) land features match up (like mountains) on different continents

Answers

The theory of Continental Drift does not shows evidence about climate. Thus option A is correct.

What is continental drift?

Continental drift is defined as the idea that the positions of Earth's continents have changed over geologic time, giving the impression that they have "drifted" across the ocean floor.

It can also be defined as the continents moving horizontally at a huge scale in relation to one another and the ocean basins throughout the course of one or more geologic epochs.

The theory of plate tectonics, which integrates this idea, had this idea as a key antecedent.

The fit of the continents, the distribution of prehistoric fossils, rocks, and mountain ranges, as well as the placements of prehistoric climatic zones, were all used as evidence for continental drift.

Thus, the theory of Continental Drift does not shows evidence about climate. Thus option A is correct.

To learn more about continental drift, refer to the link below:

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imaginary essay

Exchange place with best friend​

Answers

It was one Sunday morning. When me and my best friend ( NAME GOES HERE) switched lives we were playing a game and the game had a lot to do with holding hands

Gastric juice contains :
A ) calcium
B ) albumin proteins
C ) angiotensin
D)chloride ions

Answers

Answer:

A)calcium

Explanation:

Answer:

calcium

Explanation:

because the level of ph in it is outstanding

Study the image. A house on a beach near the ocean. Point 1 is over the house, arrow is pointing up. Point 2 is over the ocean, with arrows pointing away from the land. Point 3 is over the ocean with the arrow pointing down. Point 4 is in the ocean with arrows pointing toward land. What do the arrows at point 3 indicate? Cool air is above water. Warm air is above land. Warm air is cooling quickly. Cool air is warming quickly.

Answers

Answer:

Warm air is cooling quickly.

Explanation:

Hot air rises and cool air sinks.

Answer:

c im taking the test right now soooooooooooo hope this helped bye

Explanation:

What are three ecosystem services provided by biodiversity.

Answers

Answer:

food water habitat

Explanation:

Explain why coloured water moved up the stalks

Answers

Answer:

water molecules like to stick together (cohesion) and like to stick to the walls of the tubes of cellulose (adhesion

Explanation:

water moves from roots to leaves. ... Because water molecules like to stick together (cohesion) and like to stick to the walls of the tubes of cellulose (adhesion), they rise up the tubes all the way from the roots to the leaves.

Water molecules prefer to attach together and to the sidewalls of the cellulose tubes via which water travels from roots to the leaves.

Water molecules in plants:

Water molecules ascend up the tubes from the roots of plants because they like to adhere together (cohesion) and attach to the walls of the cellulose tubes (adhesion).

Capillary motion is what we term when water travels into small gaps like that. Because the water particles bonded to the coloring and carried it along, the color in the water travelled up into the celery with both the water in this process. Water going into a plant in nature brings nutrients from the earth with it.

Find out more information about 'Water molecules'.

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If, after adding those channels, you were to wait long enough for the system to equilibrate (i.e., reach a stable state in which the number and type of molecule in each compartment no longer changes much over time), about how many peptide molecules would you expect to find on the left side of the cell and how many on the right? How about the water molecules? Explain your reasoning.

Answers

Answer:

1 We can infer that when permeable channels are added to the peptides and a cell is incorporated in water, the concentration of peptides and water will change, generating an equilibrium causing an equivalence of equal intracellular and extracellular concentration

2. If there is no alteration and the environment is in equilibrium, we can say that there will be an equal concentration of petids and water in the intracellular and extracellular space. If we have 40 peptides on the left side, the right side will move looking for a balance and that both environments are the same, becoming 60 for each of the spaces

The number of peptides molecules on the both sides of the cell will be equal  while The water molecules will be equal on both sides of the cell .

Although your question has some missing details a general answer is provided above

After adding the channels to a system to achieve equilibrium the number of peptide molecules on both sides of the cell have to be equal.

A difference in the peptide molecules on either side of the cell will lead to a diffusion gradient and this will lead to diffusion of peptide molecules from the side with higher concentration of peptide molecules to the side with lower concentration of peptide molecules ( this means that the system is not at a stable state ).  while

A difference in the concentration of the water molecules will lead to an osmotic gradient  ( this means the system is not at a stable state ).

Hence we can conclude that for the system to reach a stable state the number of peptide molecules and the water molecules on both sides of the cell should be equal.

Learn more : https://brainly.com/question/24586695

Which statement is true about the elements of the earth? A. the earth element stays in the same area of the lithosphere, hydrosphere, or atmosphere where they originated when the earth was formed. B. The earth’s elements are used and unused in different molecules overtime. C. The earth’s elements are constantly being created and destroyed so that a constant amount of matter exists. D. The earth’s elements pollute the environment and should be discarded.

Answers

Your answer would be A. The earth element stays in the same area of the lithosphere, hydrosphere, or atmosphere where they originated when the earth was formed.

A region with a variety of organisms like tiger, fish, rabbits, birds, insects, etc.,
have a high level of
genetic diversity
species diversity
ecosystem diversity
none

Answers

Answer:

Species diversity is the right answer.

Explanation:

It is stated that the region is full of different organisms. An organism is defined as an individual animal, plant, or single-celled life form. All this variety of a region makes an ecosystem so having multiple ecosystems in a specific region is out of hand.

A central nervous system is also responsible for programming _______ and _______. PLEASE HELP!!!!

Answers

Answer:

instincts and reflexes. 

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