Question

In the fruit fly Drosophila, a rudimentary wing called "vestigial" and dark body color called "ebony"...

In the fruit fly Drosophila, a rudimentary wing called "vestigial" and dark body color called "ebony" are inherited at independent loci and are recessive to their dominant wild-type counterparts, full wing and gray body color. Dihybrid wild-type males and females are crossed, and 8800 progenies are produced (10 points)

a. How many progeny flies are expected to have full wings and gray bodies?

b. How many progeny flies are expected to have vestigial wings and ebony bodies?

c. How many progeny flies are expected to have full wings and ebony bodies?

d. How many progeny flies are expected to have vestigial wings and gray bodies?

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Answer #1

The phenotypic ratio is 9:3:3:1.Total number of progenies 8800

a. So progenies with full wing and gray bodies=9/16* 8800= 4950

b. flies with vestigial wings and ebony bodies= 1/16*8800=550

c. flies with full wings and ebony bodies=3/16*8800=1650

d. flies with vestigial wings and gray bodies=3/16*8800=1650

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