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Kākāpō
Kākāpō
An elephant seal harem has 1 male to 100 females resulting in an effective population size of only 4.
An elephant seal harem has 1 male to 100 females resulting in an effective population size of only 4.
Brown kiwi
Brown kiwi
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Changes in a population's allele frequency following a population bottleneck: the rapid and radical decline in population size has reduced the populat
Changes in a population's allele frequency following a population bottleneck: the rapid and radical decline in population size has reduced the population's genetic variation.
When very few members of a population migrate to form a separate new population, the founder effect occurs. For a period after the foundation, the sma
When very few members of a population migrate to form a separate new population, the founder effect occurs. For a period after the foundation, the small population experiences intensive drift. In the figure this results in fixation of the red allele.