Info

150 200 Generations

0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Frequency of the A allele (p)

Figure 7.6 The results of density-dependent natural selection on the numbers of individuals of different genotypes (Naa, NAa, and Naa) and allele frequencies in a population of total size N. At the upper limit of N, the equilibrium allele and genotype frequencies are determined by the genotype with the highest carrying capacity (K). In contrast, the genotype with the highest growth rate (r) has the greatest impact on allele frequency when the population is small. In this example

0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Frequency of the A allele (p)

Figure 7.6 The results of density-dependent natural selection on the numbers of individuals of different genotypes (Naa, NAa, and Naa) and allele frequencies in a population of total size N. At the upper limit of N, the equilibrium allele and genotype frequencies are determined by the genotype with the highest carrying capacity (K). In contrast, the genotype with the highest growth rate (r) has the greatest impact on allele frequency when the population is small. In this example

This equation predicts that the total population size cannot exceed the largest carrying capacity. We can also follow allele frequencies over time by modifying the expression for allele frequency after one generation of selection:

0 0

Post a comment