BIO220H1 Lecture Notes - Lecture 1: Heterogametic Sex, Ecological Genetics, Zw Sex-Determination System
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BIO220H1 Full Course Notes
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Genome: total amount of dna in organism which can be broken into different components: mitochondria (mtdna) Mitochondria = cellular organelles for burning sugar. Maternally inherited (in cytoplasm of fertilized egg) All population members have these: chloroplasts. Also have own genomes: sex chromosomes. In humans and fruit flies, have x and y chromosome. Females are xx (homogametic) and males are xy. Every individual has x chromosome, only males have y. Differences affect consequences of evolution between males (heterogametic) chromosome and females. Females are heterogametic sex: have z and w chromosome, autosomes. All of other chromosomes that we have. But can break autosomes into 2 overall broad categories: areas of high recombination. Areas of low recombination tend to evolve in same way because they"re inherited together as a unit: areas of low recombination. Amount of recombination in these sections of chromosomes affect how these section of our genomes evolve. Different parts of genome have diff modes of transmission:
