The alleles are combined according to the Hardy–Weinberg law. The Hardy–
Weinberg law is used here to calculate the inflows into the stocks of the three
genotypes (Fig. 12.2). The outflows are set equal to the stocks, reflecting the fact
that after a generation was formed the will be available again for re-mating.
Figure 12.3 shows the calculation of the relative frequencies of the genotypes.
These are plotted in Fig. 12.4. The results of the model are different from run to run
because of the random mutation process that takes place. What will happen when
the total number of alleles decreases? Run the model several times and observe the
results. How do the results change if mutation is more likely to occur in one
direction than another? What are the implications of a decreasing number of alleles
Fig. 12.2
Fig. 12.3
12.1 Model of Mating and Mutation of Alleles
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Weinberg law is used here to calculate the inflows into the stocks of the three
genotypes (Fig. 12.2). The outflows are set equal to the stocks, reflecting the fact
that after a generation was formed the will be available again for re-mating.
Figure 12.3 shows the calculation of the relative frequencies of the genotypes.
These are plotted in Fig. 12.4. The results of the model are different from run to run
because of the random mutation process that takes place. What will happen when
the total number of alleles decreases? Run the model several times and observe the
results. How do the results change if mutation is more likely to occur in one
direction than another? What are the implications of a decreasing number of alleles
Fig. 12.2
Fig. 12.3
12.1 Model of Mating and Mutation of Alleles
101