In chickens, feathered shanks, A, are dominant to clean, a, and white plumage, B, is dominant to black, b. A feathered-shanked, white, rose-combed bird was crossed with a clean-shanked, white, walnut combed bird and the following offspring were produced:
2 feathered-shanked, white, rose-combed chicks
3 feathered-shanked, black, pea-combed chicks
1 feathered-shanked, white, single-combed chick
4 clean-shanked, white, walnut-combed chicks
1 clean-shanked, black, single-combed chick
2 clean-shanked, white, rose-combed chicks
What are the genotypes of the parents? You must show your work in an orderly fashion. I need to be able to follow your logic in order to earn credit.
Option 1: AaBbRrdd and aaBbRrDd
Option 2: AaBbRRdd and aaBbRrDd
Option 3: AaBbRrdd and aaBbRRDd
Option 4: AaBBRrdd and aaBbRrDd
More than one of the above may be correct

Question

03-01-2022
Advanced Placement (AP)

Answered

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In chickens, feathered shanks, A, are dominant to clean, a, and white plumage, B, is dominant to black, b. A feathered-shanked, white, rose-combed bird was crossed with a clean-shanked, white, walnut combed bird and the following offspring were produced:
2 feathered-shanked, white, rose-combed chicks
3 feathered-shanked, black, pea-combed chicks
1 feathered-shanked, white, single-combed chick
4 clean-shanked, white, walnut-combed chicks
1 clean-shanked, black, single-combed chick
2 clean-shanked, white, rose-combed chicks
What are the genotypes of the parents? You must show your work in an orderly fashion. I need to be able to follow your logic in order to earn credit.
Option 1: AaBbRrdd and aaBbRrDd
Option 2: AaBbRRdd and aaBbRrDd
Option 3: AaBbRrdd and aaBbRRDd
Option 4: AaBBRrdd and aaBbRrDd
More than one of the above may be correct

Sagot :

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