Can you tell by looking at someone if they are pure or hybrid for a dominant gene?
No. There are two terms, genotype and phenotype. Genes can get pretty complicated because there are dominant and recessive genes. Dominant genes cover the expression of ressessive genes so it is hard to tell if someone has an underlying recessive gene. When someone has a homozygous dominant gene, meaning both alleles are dominant, has the same phenotype as a heterozygous gene meanting one dominant and one recessive allele. Their genotypes are different, but their pheontype will look the same.
