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There are 3 alleles for plumage in mallard ducks. Restricted (MR) is dominant over the wild...

There are 3 alleles for plumage in mallard ducks. Restricted (MR) is dominant over the wild type mallard (M), which is dominant over dusky (md). If two ducks with genotypes mdmd and MRM are crossed, what proportion of the F1 generation will have the genotype MRmd?

Group of answer choices

a 1/2

b 2/3

c 0

d 1

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Answer #1

The dominance pattern is clearly mentioned in the question.

Restricted(MR) > Wild type mallard(M) > Dusky(md)

Consider the cross between MRM and mdmd

mdmd x MRM Fi MRmd Restoicted Mond. Wild Type Mallood.

We can see that out of two offsprings, only one has the genotype MRmd.

So the probability is 1/2

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