50 drosophila eye color is an x-linked trait. red eye color is dominant, and white eye color is recessive. which punnett square shows the probability that 100 percent of offspring will have red eyes? (choices below)

Option A is correct.

The genotype of 100% red eyed flies will be "XRXr, XRY, XRXr, XRy"

As the red color of eyes in Drosophila is dominant, so the flies having even only one R will be having red eyes colors in a phenotype. So, all the flies male or female having R will be having red eyes for sure. Option A is the correct answer.