Recall that a person typically has two copies, called alleles, of every gene. Use what you know
about inheritance pattern to write the genotypes for a family with four kids (bb, Bb, bb, Bb).
Using B to represent a brown eye color allele and b to represent a blue eye color allele. How many children has brown eye color?
Since brown eye color is B and has a dominant trait, any pair of alleles with at least one B have brown eye color (you have to have two recessive bb in order to have blue eyes). Out of bb, Bb, bb, and Bb, there are two children with at least one dominant allele in their gene.
