Mary Jones and Geoff Jones Solutions for Chapter: Inheritance, Exercise 4: Exercise 16.4

In fruit flies, as humans, males have an X and a Y chromosome, and females have two X chromosomes.

There is a gene on the X chromosome that affects eye colour. The dominant allele of this gene produces red eyes, and the recessive allele produces white eyes.

Suggest suitable symbols for the two alleles of this gene.

In the space below, construct a genetic diagram to predict the ratios of eye colour in male and female offspring of a white-eyed male fly and a heterozygous red-eyed female fly.