Final answer:
Nonrandom mating via selfing can change allele frequencies within populations by increasing the frequency of homozygous genotypes.
Step-by-step explanation:
Nonrandom mating via selfing can indeed change allele frequencies within populations. Selfing, or self-fertilization, is a form of nonrandom mating where an individual mates with itself. In selfing, individuals that carry the same alleles for a particular gene are more likely to mate and produce offspring together. This can lead to an increase in the frequency of homozygous genotypes and a decrease in heterozygous genotypes within a population. As a result, the allele frequencies of the population can change.