In mallard ducks, Anas platyrhynchos, plumage is under the control of a single g

Question

In mallard ducks, Anas platyrhynchos, plumage is under the control of a single gene with three alleles: M, which codes for wild-type mallard plumage; M^R, which codes for restricted plumage (a modified mallard pattern with white on the wing fronts at maturity); and M0, which codes for ducky plumage (darker and plainer than the mallard). Below are four different crosses, along with the phenotypes observed among their offspring. 1. dusky x mallard right arrow 1/2 dusky, 1/2 mallard 2. dusky x restricted right arrow 1/2 dusky, 1/2 restricted 3. mallard x mallard right arrow 3/4 mallard, 1/4 dusky 4. mallard x restricted right arrow 1/2 restricted, 1/4 mallard, 1/4 dusky Use this information to determine the dominance order among these alleles. Part A- A generic dominance hierarchy can be expressed as allele #1 > allele #2 > allele #3, in which allele #1 is dominant to allele #2 and allele #2 is dominant to allele #3. For the three mallard duck alleles described, which allele would corespond to the generic allele #1? M M^R M^D Part B A generic dominance hierarchy can be expressed as allele #1 > allele #2> allele #3, in which allele #1 is dominant to allele #2 and allele #2 is dominant to allele #3. For the three mallard duck alleles described, which allele would correspond to the generic allele #2? M M^R M^D

Explanation / Answer

Part A-

MR will correspond to allele #1

part B-

M will correspond to allele #2

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