1. Andalusian chickens may be either black, white, or gray. The gene for black is not dominant over the gene for white, nor is the gene for white dominant over the gene for black. When a black rooster is mated to a white hen, all gray chicks are produced. When gray chickens are mated, the chicks are black, gray, and white.

• Using a Punnett Square, demonstrate how feather color is inherited in Andalusian chickens.
• Is the inheritance of feather color in this problem an example of incomplete dominance?
• Why would it be impossible to establish a true breeding flock of gray Andalusian chickens?