BIO220H1 Lecture 1: Lecture 1 midterm notes
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BIO220H1 Full Course Notes
Verified Note
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Document Summary
Genetics = ensuring offspring within generations inheritance transmission of information across generations evolution. Genome: total amount of dna that an organism has. Everyone has sex chromosomes, xx female, xy male. Birds, butterflies and moths: all individuals have the z chromosome, and the females have the w chromosome. Females heterogametic sex (have wz this is in birds; it is the reverse in humans) Autosomes all chromosomes that are not sex chromosomes, some regions have high recombination, if low recombination all genes tend to be inherited together. High recombination inherited independently separate. There are different modes of transmission: uniparental mitochondria y in half of the population, biparental autosomes in all members of the population. Recombination and crossing over: low recombination 1 unit, while areas of high recombination will be broken up to be inherited independently. Biparental inheritance to see how much the parents have contributed. Maternal through mtdna and paternal lineages thought y chromosomes.
