Biology 10th Edition by Eldra Solomon,Charles Martin,Diana Martin,Linda Berg

Exercise 1

One of the autosomal loci controlling eye color in fruit flies has two alleles, one for brown eyes and the other for red eyes. Fruit flies from a true-breeding line with brown eyes were crossed with flies from a true-breeding line with red eyes. The F 1 flies had red eyes. What conclusion can be drawn from this experiment?
A) these alleles underwent independent assortment
B) these alleles underwent segregation
C) these genes are X-linked
D) the allele for red eyes is dominant to the allele for brown eyes
E) all of the preceding are true