A Heterozygous, but Phenotypically Wild- Type Fruit Fly Gray Body

question 25

Multiple Choice

A heterozygous, but phenotypically wild- type fruit fly gray body colour and normal wings) was mated to a black fly with vestigial wings. The offspring had the following phenotypic distribution: wild type, 720;
Black- vestigial, 780; black- normal, 280; gray- vestigial, 220. What conclusion is likely from these results?

• A) Epistasis has modified a 9:3:3:1 ratio.
• B) The black and vestigial loci are linked.
• C) The black and vestigial loci are allelic.
• D) The black and vestigial loci assort independently from each other.

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