The B locus has two alleles B and b with frequencies of 0.8 and 0.2, respectively, in a population in the current generation. The genotypic fitnesses at this locus are wBB= 1.0, wBb = 1.0 and wbb = 0.0.
a.) What will the frequency of the b allele be in the next generation?
b.) What will the frequency of the b allele be in two generations?
c.) What will the frequency of the b allele be in two generations if the fitnesses are: wBB= 1.0, wBb = 0.0 and wbb = 0.0.
d.) Why is the difference between answers in parts b.) and c.) so large?
The B locus has two alleles B and b with frequencies of 0.8 and 0.2, respectively, in a population in the current generation. The genotypic fitnesses at this locus are wBB= 1.0, wBb = 1.0 and wbb = 0.0.
a.) What will the frequency of the b allele be in the next generation?
b.) What will the frequency of the b allele be in two generations?
c.) What will the frequency of the b allele be in two generations if the fitnesses are: wBB= 1.0, wBb = 0.0 and wbb = 0.0.
d.) Why is the difference between answers in parts b.) and c.) so large?
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Suppose you take a look at a specific population of this species, and survey the genotype numbers on two successive generations:
| AA | Aa | aa | |
| First generation | 159 | 292 | 105 |
| Second generation | 150 | 203 | 58 |
a, What is the mean fitness of the population in the first generation? In the second generation?
b, How have the allele frequencies changed from the first to the second generations?
c, What are the apparent fitnesses of the three genotypes?
d, If these fitnesses don't change, what will eventually happen to the genetic make-up of the population?
