Founder eventthe establishment of a new population by

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Unformatted text preview: A a a A a A A A a a A A A A a A A a A A a A a a A A A a A a A Consider a popula2on of 1,000 diploid individuals. Each genera2on, on average only about 50 random individuals breed to “reseed” N = 1000 individuals. 60% A 40% a n=50 50% A 50% a n=50 42% A 58% a n=50 77% A 23% a A A a a a a a A A A A A A a A A A a a A a A A A a a A A A A a A A a A A a A a a A A A a A a A Consider a popula2on of 1,000 diploid individuals. Each genera2on, on average only about 50 random individuals breed to “reseed” N = 1000 individuals. 60% A 40% a n=50 50% A 50% a n=50 42% A 58% a n=50 77% A 23% a A A a a a a a A A A A A A a A A A a a A a A A A a a A A A A a A A a A A a A a a A A A a A a A Random Gene2c DriY: occurs due to sampling error occurs when sampling each genera2on is unrelated to phenotype/genotype Small population sizes magnify opportunities for genetic drift 1.  Bottleneck—A large-scale but short-term reduction in population size followed by an increase in population size 2.  Founder event—The establishment of a new population by a small number of individuals Achromatopsia •  rare disease •  autosomal recessive •  impaired color vision •  reduced visual acuity •  debilitating glare •...
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This note was uploaded on 01/13/2014 for the course BIONB 2210 taught by Professor Seeley during the Fall '10 term at Cornell University (Engineering School).

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