BIOL 180 Chapter Notes - Chapter 26: Inbreeding, Genotype Frequency, Allele Frequency
93
BIOL 180 Full Course Notes
Verified Note
93 documents
Document Summary
In hw model, gametes are picked randomly from gene pool and paired to create offspring genotypes. Naturally, however, matings between individuals may not be random with respect to gene in question: even with clams. Even though they leave gametes in water to randomly pair, it is more likely clams living closer to each other pair than clams that live further from each other. Most intensive studied form of nonrandom mating: inbreeding: mating between relatives. How does inbreeding affect allele frequencies and genotype frequencies. Two fundamental points about inbreeding: (1) inbreeding increases homozygosity - inbreeding takes alleles from heterozygotes and puts them into homozygotes (2) inbreeding itself does not cause evolution because allele frequencies do not change in population as a whole. Nonrandom mating changes only genotype frequencies, not allele frequencies so it"s not an evolutionary process itself. Even though inbreeding does not cause evolution directly because allele frequencies don"t change, it can speed rate of evolutionary change.
