The allele for a cleft chin is dominant in humans what are the possible result for a cross between parents that have genotype cc and cc

Heterozygous Cc (50%) or homozygous cc (50%)

Explanation:

An individual with heterozygous Cc genotype would have the cleft chin phenotype, since the allele is dominant. An individual with homozygous cc genotype would not have the phenotype, since they don't have a copy of the cleft chin allele.

The punnet square of the cross between Cc and cc parents is attached. 1:2 genotypes are Cc, and 1:2 genotypes are cc.

Therefore, there is a 1:2 chance the individual will have a cleft chin

it would be heredity