ninelec - Population Genetics ANS 3384 Population Genetics...

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Unformatted text preview: Population Genetics ANS 3384 Population Genetics Populations- definition: Herds, breeds, an entire species, or a small group of animals within a herd. Population genetics- definition: The study of factors affecting gene and genotypic frequencies in a population. Genotype The genetic makeup of an individual Phenotype Physical expression of a genotype An observed category or measured level of performance for a trait in an individual Definitions EE (homozygous dominant) Ee (heterozygous) ee (homozygous recessive) Black color in Angus Phenotypic frequency. Proportion of the individuals in a population that are a particular phenotype. Genotypic frequency. Proportion of the individuals in a population that are a particular genotype. Black color in Angus IF in 100 Angus calves 65 black and 35 red, Then the phenotypic frequencies are: Black: 0.65 Red: 0.35 Black color in Angus Genotypic frequency? EE and Ee are black ee is the only way to get red Black color in Angus Genotype: 35 EE and 30 Ee are black 35 are ee and red Genotypic frequency: 35 EE/100 = .35 30 Ee/100 = .30 35 ee/100 = .35 Gene or Allelic Frequency The relative frequency of a particular allele in a population. If we consider a population, we simply counted the number of genes of a particular type and divided by the total number of genes at that locus in the population. p 2 = Frequency of homozygous dominant genotype: EE...
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This note was uploaded on 07/16/2011 for the course ANS 3384 taught by Professor Olson during the Spring '09 term at University of Florida.

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ninelec - Population Genetics ANS 3384 Population Genetics...

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