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In Drosophila Melanogaster,vestigial (Short)wings (Vg)are Caused by a Recessive Allele

Question 32

Multiple Choice

In Drosophila melanogaster,vestigial (short) wings (vg) are caused by a recessive allele of a gene that independently assorts with a gene pair that influences body hair.Hairy (h) results in a hairy body.A cross is made between a fly with normal (wild) wings and a hairy body and a fly with vestigial wings and a normal (wild) body.The phenotypically normal F₁ flies were crossed among each other,and 1024 F₂ flies were reared.What phenotypes would you expect in the F₂,and in what actual numbers (not ratios) would you expect to find them?


A) phenotypes all wild;numbers expected wild (1024)
B) phenotypes hairy,vestigial hairy;numbers expected hairy (512) ,vestigial hairy (512)
C) phenotypes wild,vestigial,hairy,vestigial hairy;numbers expected wild (256) ,vestigial (256) ,hairy (256) ,vestigial hairy (256)
D) phenotypes wild,vestigial;numbers expected wild (576) ,vestigial (576)
E) phenotypes wild,vestigial,hairy,vestigial hairy;numbers expected wild (576) ,vestigial (192) ,hairy (192) ,vestigial hairy (64)

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