True or falseif a dihybrid cross is performed, the expected genotypic ratio is 9: 3: 3: 1. a student uses the product rule to predict that the probability of flipping a coin twice and getting a head and then a tail is 14. a test cross between a heterozygous parent and a homozygous recessive parent is expected to produce a 1: 1 genotypic and phenotypic ratio. the outcome of a trihybrid cross is predicted by the law of segregation. reciprocal crosses that produce identical results demonstrate that a strain is pure-breeding. if a woman is heterozygous for albinism, an autosomal recessive condition that results in the absence of skin pigment, the proportion of her gametes carrying the allele that allows pigment expression is expected to be 75%.