Predicted Proportions in a Population

@@® one type of gametes two types of gametes one type of gametes A In this two allele system, B specifies dark blue flowers; b, white. Plants that are homozygous (B or b) make one kind of gamete. Heterozygous plants (31;) have light blue flowers and make two kinds of gametes (B and b). p. q@ P. BB(P2)*B b<Pq)T>"/’- l/ q@ BMW)“ i M?) iv p} \l// \l// l-.. 1.- fi *2 /\1 BB( ()1)2 Bb( (qu) bb(q2) B Say )2 is the proportion of B alleles in the gene pool, and q is the proportion of b alleles. This Punnett square shows that in each generation, the predicted proportion of offspring that will inherit two B alleles isp x p, or p2. Likewise, the proportion that will inherit both alleles is 2w, and the proportion that will inherit two b alleles is £12.