In a family, both parents show a characteristic produced by the dominant allele of a gene. They have two children. The family pedigree diagram is shown. Which row gives the genotypes of the parents for this gene?
- Afemale parent heterozygous; male parent heterozygous
- Bfemale parent heterozygous; male parent homozygous
- Cfemale parent homozygous; male parent heterozygous
- Dfemale parent homozygous; male parent homozygous