With the assumption that the population follows Hardy-Weinberg equilibrium, it can be expected that it follows the equation p^{2} + 2pq + q^{2} + 2qr + r^{2} + 2pr = 1, where p is the allele frequency for *I ^{A}*, q for

The other terms are defined below, along with their values:

p^{2 }(0.09) is for the genotypic frequency for homozygous *I ^{A}*

2pq (0.36) is for heterozygous *I ^{A}*

q^{2} (0.36) is for homozygous *I ^{O}*

2qr (0.12) is for heterozygous *I ^{B}*

r^{2} (0.01) is for homozygous *I ^{B}*

2pr (0.06) is for heterozygous *I ^{A}*

It should be noted that unlike systems with just two alleles, having three alleles would modify the other equation to p + q+ r = 1.

Human blood type is determined by three alleles, *I ^{A}*,

a. Calculate the expected number of people in the population having each blood type A, B, AB, and O.

b. Determine the percentage of type B people that are heterozygous.

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