A

Figure 2.7 A schematic representation of random mating as a cloud of gas where the frequency of A alleles is 14/24 and the frequency of a alleles is 10/24. Any given A has a frequency of 14/24 and will encounter another A with probability of 14/24 or an a with the probability of 10/24. This makes the frequency of an A-A collision (14/24)2 and an A-a collision (14/24)(10/24), just as the probability of two independent events is the product of their individual probabilities. The population of A and a alleles is assumed to be large enough so that taking one out of the cloud will make almost no change in the overall frequency of its type.

colliding. To calculate the probabilities of mating among the three different genotypes we can make a table to organize the resulting mating frequencies. This table will predict the mating frequencies among genotypes in the initial generation, which we will call generation t.

A parental mating frequency table (generation t) is shown below.

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