If B is the trait for brown eyes and b is the trait for blue, and a Homozygous Dominant dad and a homozygous recessive mom have off-spring. How many of the F1 generation will be bb?
Zero of the offspring will be bb. Since each offspring receives one allele from each parent, all will receive a B from Dad and a b from Mom, making all of the offspring heterozygous (Bb) and brown-eyed.
