Lecture 14

Lecture 14 - Bio 121 Lecture 14 Population genetics:...

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Bio 121 Lecture 14 – Population genetics: hardy-weinberg law A. Genetics – on a large scale a. Frequency of alleles in genotypes of a whole population and the next gen. b. Population – group of individuals of the same species in a localized area which are capable of interbreeding B. The gene pool – genetic makeup of population a. Choose your population a.i. Example – 2 populations of fruit flys a.i.1. G1 - 60 DD, 40 dd (30DD males,30DDfemales,20ddmales,20dd females) a.i.2. 60% that are D, 60% eggs D, 40% eggs are d, 40% sperm d a.i.3. 0.6 D sperm. 0.4 d sperm, 0.6 D eggs, 0.4 d eggs a.i.4. G2 - 0.36 DD, 0.24 Dd, 0.24 Dd, 0.16 dd b. Results for G2 b.i. 36% DD, 48% Dd, 16% dd b.ii. D phenotype 84%, d phenotypes 16% c. Mate G2 population c.i. .36 Dsperm, 0.36 D eggs, 0.16 d sperm, 0.16 d eggs, 0.24 D sperm. 0.24 d sperm c.ii. 0.36+0.24 = 0.60 D gametes. 0.16+0.24 d gametes = 0.40 d gametes C. Population in genetic equilibrium a. Allele frequencies don’t change b. Genotype frequency remains constant
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This note was uploaded on 03/12/2012 for the course BIO 121 taught by Professor Minchella during the Fall '10 term at Purdue.

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Lecture 14 - Bio 121 Lecture 14 Population genetics:...

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