3. A large, human population is analyzed for A, B, AB, and 0 blood types. All bl

Question

3. A large, human population is analyzed for A, B, AB, and 0 blood types. All blood types occur in the population, and the alleles are in Hardy-Weinberg equilibrium. The frequencies of the alleles in the gene pool are shown to be (a) What will be the most common blood type in the population? (b) What percentage of the Type B persons will be heterozygous? (c) What will be the frequency with which two Type AB persons will mate in this population, assuming mating is random with regard to blood type? (d) In this population, how often would you expect to find a family in which the father Type A and the mother is Type B? 4. You observe the following distribution of autosomal genotypes in a population in

Explanation / Answer

Alleles A and B are dominant over O. 1=(p+q+r)2r O=r, A=p+2pr=0.3, B=q+2qr=0.1, AB=2pq

R*R=0.6 so r=0.77

most common type=greatest among these 4:(0.3+2*0.3*0.77) or (0.1+2*0.1*0.77) or (2*0.3*0.1) or 0.6

heterozygous=2pq.=2*0.3*0.1=0.06

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