when a purine is substituted for the other purine (A or G) or pyrimidine is substituted for the other pyrimidine (T or C)
when a purine is substituted for a pyrimidine or a pyrimidine is substituted for a purine
integrates Darwin's Theory of Evolution by Natural Selection with Mendelian genetics
There is no selection
There is no mutation
There is no migration
There are no chance events
Individuals choose their mates at random
the movement of alleles between populations; migration means "gene flow"
gene flow: the transfer of alleles from the gene pool of one populaton to the gene pool of another population
the fraction of the total variation in a trait that is due to variation in genes; always a number between 0 and 1
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