These characteristics therefore increase in frequency over time leading the population to evolve. Variations neither useful nor injurious would not be affected by natural selection, and would be left a fluctuating element, as perhaps we see in the species called polymorphic. Assume that individuals produce haploid gametes that form a gamete pool. Gametes within the gamete pool unite at random to produce the next generation of diploid individuals. Since all individuals are equally fit, the gamete allele frequencies are equal to parental allele frequencies.
Gametes unite at random in the gamete pool to produce diploid offspring.
To calculate offspring frequencies we use mating tables. These are known as the Hardy-Weinberg frequencies. In the absence of selection and mutation, allele frequencies stay constant. Meiosis and random mating do not, by themselves, change allele frequencies. The population is effectively infinite Mating occurs randomly among gametes One of the homework problems will investigate changing the last assumption.