Q: Curly hair is recessive, and straight hair is dominant. A woman with curly hair marries a man who is homozygous dominant for straight hair. Predict the outcomes for their children.

Flexi Says: The most well-studied example of incomplete dominance in humans occurs in the genes for curly hair. Inheriting a gene for curly hair from one parent and a gene for straight hair from the other parent will give a hair with a phenotype intermediate between curly and straight hair, which is wavy hair. Human height is also due to incomplete dominance, although there is more than one gene involved in height.