For people, curly hair is dominant and straight hair is recessive. Genetics problem: Mom has straight hair and Dad is homozygous for curly hair. The chance that their child will have straight hair is:

Question

Quizplus · Accepted Answer

Since straight hair is recessive, the mom must have two recessive alleles. The dad, being homozygous for curly hair, has two dominant alleles. Their children will all inherit one dominant allele from the dad and one recessive allele from the mom, resulting in all children having curly hair. Therefore, there is a 0% chance of their child having straight hair.

For People, Curly Hair Is Dominant and Straight Hair Is