BIOLOGY 1M03 Lecture Notes - Lecture 8: Sexual Selection, Genotype Frequency, Anisogamy
20 Jan 2017
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Document Summary
Non-random mating: different levels of gene flow in different parts of the human genome due to biased mate pairing. Effects of natural selection, drift, migration and mutation on genetic variation. What is the nature of gene flow in humans? (example) Different parts of the genome have different modes of inheritance. Ex: mitochondrial dna: males have mtdna but do not pass it on to offspring: only inherited from mothers (female inherited 100%) We can use variation in these parts of genomes to track modes of inheritance. Example of this: gene flow between people of african and european ancestry in. In nature, mating may not be random with respect to any gene in question. Inbreeding and sexual selection are two types of inbreeding. Inbreeding: : mating between relatives: increases frequency of homozygotes and reduces the frequency of homozygotes in each generation, does not change allele frequencies, but it does change gene frequencies.
