BIO220H1 Lecture Notes - Lecture 1: Y Chromosome, Mitochondrion, Inbreeding Avoidance
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BIO220H1 Full Course Notes
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Document Summary
Different compartments (affect variation of species) (mitochondria, chloroplasts, sex chromosomes, Different parts of the genome have alternative modes of transmission. Uniparentally inherited (mt,y) mt for females only and y males only. Areas of low recombination will be inherited as a unit, high recombination inherited independently. Mtdna is used to track maternal lineages. Combined application: use genetic markers to understand evolutionary process and understand data about behaviour and ecology and patterns in genetic data. Females live with their natal group (2-20) Males leave their natal groups at adolescence, but no other social groups. Male reproductive lifespan is long and many males are still able to reproduce when their daughters mature. Hard to do experiments because gestation is 22 months, lifespan is 62 years, and therefore need to use gentic markers to apply an inferential approach. These results even hold for paternal kin! Reproductive success is highly skewed and creates strong costs of inbreeding avoidance.
