Question

If a female fruit fly heterozygous for red eyes (XRXr) crossed with a white-eyed male (XrY), what percent of their offspring would have white eyes?

Answer 1

Answer:

50%

Explanation:

Hello!

We can observe that:

R red eyes

r white eyes

The possible gametes for the female are XR and Xr.

The possible gametes for the male are Xr and Y

Xr Y

XR XRXr XRY

Xr  XrXr XrY

The expected offspring is:

a red-eyed female (XRXr)

a red-eyed male (XRY)

A female with white eyes (XrXr)

A white-eyed male (XrY)

Success in your homework!