If this trisomic male (ey + ey-, gw + gw-) is crossed with a (ey - ey-, gw - gw-) female, what proportion of the progeny will be phenotypically wild-type?

Question

Biology

Lawson Keith

7 August, 06:10

If this trisomic male (ey + ey-, gw + gw-) is crossed with a (ey - ey-, gw - gw-) female, what proportion of the progeny will be phenotypically wild-type?

+2

Answers (1)

Know the Answer?

Bryant Spencer · Answer 1

The Ey and the gw abbreviations stand for eyeless and gawky genes in the fruit fly Drosophila. A wild-type individual has at least one dominant allele for both of these genes.

In the cross presented below, you can see that 25% (shown in red) of the progeny would be wild-type and the rest of the progeny would show at least one recessive trait (eyeless or gawky)