Chapter 18
Speciation
Gene Pool
The total of all the different genes in a population is known as the gene pool.
The gene frequency is the frequency of occurrence of an allele of a gene in a
population (relative to all the other alleles at the same locus).
If a population is large (and mating is random) then gene frequencies usually remain
constant from one generation to the next. This stability is known as genetic
equilibrium.
The process of evolution depends on changes occurring in the gene pool
(otherwise things continue as before)
Alteration to the gene pool results from the following processes. Make notes
using p 130 Torrance.

Mutation

Natural selection

Gene migration

Non-random mating

Genetic drift

Chance
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