BIO 1130 Lecture Notes - Lecture 12: Genetic Drift, Cladogenesis, Dynastinae

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Jon Houseman

Document Summary

Marks should be posted by october 14, 2015. Population genetics gives us mechanism to measure when allele frequencies occur. Come to conclusion that our definition of evolution/natural selection will be b detecting change in allele frequency in population. Hardy & weinberg give us useful equation, p2 + 2pq + q2. Realize there are other ways that allelic frequencies can change. Must also be able to identify what can cause change, expanded definition. Most traits in population controlled by multiple alleles. Whole cascade of allelic traits resulting in range of characteristics. Have to look for range within population. Should be normal distribution of traits (bell curve) Very few individuals at extremes, lots around middle. Gives us way to measure variation within population. Directional selection particular group selected against (has disadvantage) as individuals" alleles producing extremes eliminated ideally mean would shift upwards, spread would remain the same.