Exam Review 1 - q = the frequency of the recessive...

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Exam 1 review
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Mitosis versus meiosis http://www.pbs.org/wgbh/nova/baby/me dia/divi.swf
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Codominance in blood
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Evolution Natural selection vs. genetic drift Bottleneck effect, founder effects
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A founder effect occurs when a new colony is started by a few members of the original population. This small population size means that the colony may have: * reduced genetic variation from the original population. * a non-random sample of the genes in the original population. Founder effects
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Hardy-Weinberg p 2 + 2pq + q 2 p = the frequency of the dominant allele (represented here by A)
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Unformatted text preview: q = the frequency of the recessive allele (represented here by a) p2 = frequency of AA (homozygous dominant) 2pq = frequency of Aa (heterozygous) q2 = frequency of aa (homozygous recessive) • Your answer: 0.4 • Answer: • You should expect 160 to be homozygous dominant. • Calculations: • q2 for this population is 360/1000 = 0.36 • q = = 0.6 • p = 1 - q = 1 - 0.6 = 0.4 • The homozygous dominant frequency = p2 = (0.4)(0.4) = 0.16. • Therefore, you can expect 16% of 1000, or 160 individuals, to be homozygous dominant....
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