Each fly has two copies of genes, one from each parent. A gene for red eye color is dominant over white. Flies with one red and one white gene will have orange eyes. If two orange-eyed flies mate, their children will each have a 50% chance of inheriting two copies of the red or white gene, and a 50% chance of inheriting one of each, also resulting in orange eyes.

1. Genetics puzzle
Every fly has two copies of each gene. It gets one copy from each of its
parents.
In the eye, the gene for the colour RED is stronger than the gene for white. A
fly with one RED gene and one white gene has Orange eyes.
What colour eyes will the children of two Orange-eyed flies have?
Remember! Each baby fly gets one gene copy from each parent!
RED + white = Orange RED + white = Orange
Alicia Hidalgo laboratory resources for Brain Awareness Week 2012,
Gene 1 = ____________ Gene 1 = ____________ Gene 1 = ____________
Gene 2 = ____________ Gene 2 = ____________ Gene 2 = ____________
Eye colour = _________ Eye colour = _________ Eye colour = _________
If the Orange-eyed parents have 40 children, how many of each
resource created by Simon Bishop
colour will there be?