In humans, one of the genes for hair color has two alleles, a dominant allele B for brown hair and a recessive lallele b for blond hair. The gene for the antigens that determine blood groups has three alleles: IA for the A anitigen, IB or the B antigen, and i, which does not code for an antigen. With respect to the hair color and blood antigen genes, how many genotypically different types of gametes could a person with Type AB blood and blond hair produce. 2 1 4 6