BIO 311D Lecture Notes - Lecture 26: Genetic Drift, Genotype Frequency, Panmixia
Document Summary
Bio 311d, dr. donald levin, lecture #26, 31 march 2017 (all images are taken from dr. levin"s lecture slides, which are available on his website http://www. sbs. utexas. edu/levin/bio311d/) Can result in a total loss of one or more alleles (in extreme cases) Deviation due to a smaller population which leads to sampling error. Cancer has a heritability of about 0. 4: so most reasons are environmental, but the environment can still cause genetic change. Random mating is needed for the hardy-weinberg equilibrium: therefore, a choice of mates independent of genotype and phenotype could result in inbreeding. Relatives defined as close: parents, siblings, children: all of these share at least 50% of an individual"s dna. Other relatives for inbreeding: cousins: shares 12. 5% of dna. Inbreeding results in a loss of heterozygosity: (can be seen in the table above, offspring of related parents (products of inbreeding) are subject to various health issues, such as smaller size, reduced performance, etc.
