BIOL 12100 Lecture Notes - Lecture 11: Dwarfism, Gene Flow, Gamete
24 Feb 2015
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Hw => aa = . 25, aa = . 5, aa = . 25. P=# of a alleles/total alleles=(37. 5*2)*. 25/200 = . 5. Recessive genetic diseases cone in particular groups. Between population homogenizing effects prevent local adaptation in. Population = 10^6 => 40,000 copies of x. Population = 100 => 4 copies of x. Population = 50 => 2 copies of x. Small population => fluctuations in allele frequency => loss of allele even if adaptively superior. 1984 => 13% of 17,000 amnish carriers of rare allele. After spraying => 1000 population survived (10%) 0. 20/0. 20 = 1. 0 (m2m2) (more resistant to insecticide) P = m1 = (2(3600)+4800)/20000 = 0. 60. P = m1 = 2(200)+480/2000 = 0. 44. Frequency of malathion resistant genotype m2m2(before) 1600 => 10,000 * 10^-4 = 1 new m2 allele. Random sampling error change q = 0. 03. Population size is small , genetic drift can change allele frequency allele frequency significantly. Reduces variation by squeezing to avg. alleles.
