Use the following information to answer the questions below.
Drosophila (fruit flies) usually have long wings (+) but mutations in two different genes can result in bent wings (bt) or vestigial wings (vg).
-If flies that are heterozygous for both the bent wing gene and the vestigial wing gene are mated, what is the probability of offspring with bent wings only?
A) 1/8
B) 3/8
C) 1/4
D) 9/16
E) 3/16

Question

Quizplus · Accepted Answer

The probability of offspring with bent wings only is 3/16. This is calculated by considering the independent assortment of the two genes, each with a 3:1 ratio for the dominant to recessive phenotype. The probability of having bent wings (bt) and not vestigial wings (vg) is (1/4) for bt/bt and (3/4) for +/vg, resulting in (1/4) * (3/4) = 3/16.

Use the Following Information to Answer the Questions Below