Simon Has Curly Hair

Multiple Choice

Simon has curly hair. If he is homozygous for the gene that determines curly hair, what is true of his parents? ​

A) They must each have a recessive allele for straight hair.
B) One must have a recessive allele for straight hair, while the other must have a dominant allele for curly hair.
C) They must each have a recessive allele for curly hair.
D) They must both have mutated dominant genes for straight hair