4 Consider the following three autosomal recessive mutations in Drosophila: vest

Question

4 Consider the following three autosomal recessive mutations in Drosophila:

vestigial wings (v); wild type is long (v+)
black body color (b); wildtype is gray (b+)
plum eyes (p); wildtype is red (p+)

A vestigal, gray, red female (homozygous for all three genes) is crossed with a long wing, black, plum male (homozygous for all three genes). The F1 female progeny are mated with triple homozygous recessive males. Here is the phenotypic data for the F2 progeny:

vestigal; gray; red 580
long wings; black; plum 592
vestigal; black; red 45
long; gray; plum 40
vestigal; black; plum 89
long; gray; red 94
vestigal; gray; plum 3
long; black; red 5

A total of 1448 progeny were counted.

Which one of the following is the correct gene order?

v p b

v b p

b v p

Explanation / Answer

Answer:

Traits of drosophila

vestigial wings (v); wild type is long (v+)
black body color (b); wildtype is gray (b+)
plum eyes (p); wildtype is red (p+)

The correct gene order is given below.

vbp

Hence,option(b) is correct answer.

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