In humans, a simple explanation of hair texture suggests that it is controlled by two alleles. One allele produces curly hair and the other produces straight hair. A person who is heterozygous for the alleles will have wavy hair. A man with curly hairs has children with a woman whose hair is straight. They have four children, all of whom have wavy hair. Based on the information given, it is reasonable to conclude that both parents are heterozygous both parents are homozygous the man is homozygous and the woman is heterozygous the woman is homozygous and the man is heterozygous

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