Out of four children that Mr. Anderson has, one of them would expect to have straight hair.
Incomplete dominance may be defined as a phenomenon in which the F1 hybrid exhibits characteristics intermediate to the parental genes.
In this situation, the alleles CC are responsible for curly hair, the alleles cc are responsible for straight hair, and the heterozygous Cc alleles are responsible for wavy hair.
When both parents with heterozygous genotypes are crossed, they produce the offspring with the genotypes CC, Cc, Cc, and cc. And the phenotypes are Curly: Wavy: Wavy: straight in the ratio of 1:2:1.
Therefore, out of four children that Mr. Anderson has, one of them would expect to have straight hair.
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