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A roan bull is bred to three cows. Cow A has the same genotype as the roan bull. cow B is red and cow C is white. what proportions of roan cows are expected in the offsprings of each group of cows :-
- a)2,1,1
- b)1,2,1
- c)1,1,2
- d)3,1
Correct answer is option 'A'. Can you explain this answer?
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A roan bull is bred to three cows. Cow A has the same genotype as the ...
Coat colour in cows is governed by two alleles; W (red) and w (white). These two alleles show codominance and the hybrid genotype (Ww) has a roan coloured coat. The genotype of a roan cattle is "Ww", that of red is "WW" and that of a white one is "ww". A cross between a roan bull and roan cow produces red, roan and white phenotypes in 1:2:1 ratio respectively. A cross between roan bull (Ww) and red cow (WW) produces roan and red phenotypes in 1:1 ratio. A cross between roan bull (Ww) and white cow (ww) produces roan and white phenotypes in 1:1 ratio. The proportions of roan cows in the offspring of each group of cow is 2,1,1. Thus, the correct answer is option A.
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A roan bull is bred to three cows. Cow A has the same genotype as the ...
1st case me phenotypic ratio(Rr×Rr)=1:2:1 Rr=2
2nd case me phenotypic ratio(RR×Rr)=1:1 Rr=1
3rd case me phenotypic ratio(rr×Rr) =1:1 Rr=1
so ratio is 2:1:1 option A
2nd case me phenotypic ratio(RR×Rr)=1:1 Rr=1
3rd case me phenotypic ratio(rr×Rr) =1:1 Rr=1
so ratio is 2:1:1 option A
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A roan bull is bred to three cows. Cow A has the same genotype as the ...
To solve this problem, we need to consider the genotype of each parent and use Punnett squares to determine the expected genotypes of the offspring.
First, let's consider the roan bull and Cow A, which have the same genotype. Roan is a codominant trait, meaning that both alleles (red and white) are expressed equally. Therefore, we can represent the roan bull's genotype as Rr, where R represents the red allele and r represents the white allele. Cow A must also have the genotype Rr. When we cross these two parents in a Punnett square, we get the following:
| | R | r |
|---|---|---|
| R | RR | Rr |
| r | Rr | rr |
From this Punnett square, we can see that half of the offspring will be roan (Rr), one quarter will be red (RR), and one quarter will be white (rr). Therefore, in this group of cows, we expect to get 2 roan cows and 1 red cow and 1 white cow.
Next, let's consider Cow B, which is red. Since Cow B is red, we know that she must have the genotype RR (two copies of the red allele). When we cross Cow B with the roan bull (Rr), we get the following Punnett square:
| | R | r |
|---|---|---|
| R | RR | Rr |
| R | RR | Rr |
From this Punnett square, we can see that all of the offspring will be roan (Rr). Therefore, in this group of cows, we expect to get 2 roan cows.
Finally, let's consider Cow C, which is white. Since Cow C is white, we know that she must have the genotype rr (two copies of the white allele). When we cross Cow C with the roan bull (Rr), we get the following Punnett square:
| | R | r |
|---|---|---|
| r | Rr | Rr |
| r | Rr | Rr |
From this Punnett square, we can see that all of the offspring will be roan (Rr). Therefore, in this group of cows, we expect to get 2 roan cows.
Overall, we expect to get 2 roan cows in each group of cows. Therefore, the correct answer is option A (2,1,1).
First, let's consider the roan bull and Cow A, which have the same genotype. Roan is a codominant trait, meaning that both alleles (red and white) are expressed equally. Therefore, we can represent the roan bull's genotype as Rr, where R represents the red allele and r represents the white allele. Cow A must also have the genotype Rr. When we cross these two parents in a Punnett square, we get the following:
| | R | r |
|---|---|---|
| R | RR | Rr |
| r | Rr | rr |
From this Punnett square, we can see that half of the offspring will be roan (Rr), one quarter will be red (RR), and one quarter will be white (rr). Therefore, in this group of cows, we expect to get 2 roan cows and 1 red cow and 1 white cow.
Next, let's consider Cow B, which is red. Since Cow B is red, we know that she must have the genotype RR (two copies of the red allele). When we cross Cow B with the roan bull (Rr), we get the following Punnett square:
| | R | r |
|---|---|---|
| R | RR | Rr |
| R | RR | Rr |
From this Punnett square, we can see that all of the offspring will be roan (Rr). Therefore, in this group of cows, we expect to get 2 roan cows.
Finally, let's consider Cow C, which is white. Since Cow C is white, we know that she must have the genotype rr (two copies of the white allele). When we cross Cow C with the roan bull (Rr), we get the following Punnett square:
| | R | r |
|---|---|---|
| r | Rr | Rr |
| r | Rr | Rr |
From this Punnett square, we can see that all of the offspring will be roan (Rr). Therefore, in this group of cows, we expect to get 2 roan cows.
Overall, we expect to get 2 roan cows in each group of cows. Therefore, the correct answer is option A (2,1,1).
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A roan bull is bred to three cows. Cow A has the same genotype as the roan bull. cow B is red and cow C is white. what proportions of roan cows are expected in the offsprings of each group of cows :-a)2,1,1b)1,2,1c)1,1,2d)3,1Correct answer is option 'A'. Can you explain this answer?
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A roan bull is bred to three cows. Cow A has the same genotype as the roan bull. cow B is red and cow C is white. what proportions of roan cows are expected in the offsprings of each group of cows :-a)2,1,1b)1,2,1c)1,1,2d)3,1Correct answer is option 'A'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about A roan bull is bred to three cows. Cow A has the same genotype as the roan bull. cow B is red and cow C is white. what proportions of roan cows are expected in the offsprings of each group of cows :-a)2,1,1b)1,2,1c)1,1,2d)3,1Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A roan bull is bred to three cows. Cow A has the same genotype as the roan bull. cow B is red and cow C is white. what proportions of roan cows are expected in the offsprings of each group of cows :-a)2,1,1b)1,2,1c)1,1,2d)3,1Correct answer is option 'A'. Can you explain this answer?.
A roan bull is bred to three cows. Cow A has the same genotype as the roan bull. cow B is red and cow C is white. what proportions of roan cows are expected in the offsprings of each group of cows :-a)2,1,1b)1,2,1c)1,1,2d)3,1Correct answer is option 'A'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about A roan bull is bred to three cows. Cow A has the same genotype as the roan bull. cow B is red and cow C is white. what proportions of roan cows are expected in the offsprings of each group of cows :-a)2,1,1b)1,2,1c)1,1,2d)3,1Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A roan bull is bred to three cows. Cow A has the same genotype as the roan bull. cow B is red and cow C is white. what proportions of roan cows are expected in the offsprings of each group of cows :-a)2,1,1b)1,2,1c)1,1,2d)3,1Correct answer is option 'A'. Can you explain this answer?.
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A roan bull is bred to three cows. Cow A has the same genotype as the roan bull. cow B is red and cow C is white. what proportions of roan cows are expected in the offsprings of each group of cows :-a)2,1,1b)1,2,1c)1,1,2d)3,1Correct answer is option 'A'. Can you explain this answer?, a detailed solution for A roan bull is bred to three cows. Cow A has the same genotype as the roan bull. cow B is red and cow C is white. what proportions of roan cows are expected in the offsprings of each group of cows :-a)2,1,1b)1,2,1c)1,1,2d)3,1Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of A roan bull is bred to three cows. Cow A has the same genotype as the roan bull. cow B is red and cow C is white. what proportions of roan cows are expected in the offsprings of each group of cows :-a)2,1,1b)1,2,1c)1,1,2d)3,1Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
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