BIOC63H3 Lecture Notes - Lecture 13: Effective Population Size, Endangered Species, Genetic Drift
13 Dec 2013
School
Department
Course
Professor
Document Summary
The more genetically diverse an individual is, the more fit for survival positive correlation between individual fitness and genetic diversity. English primrose populations the larger the population size the larger the offspring (cumulative cm) Increased population size = increased genetic diversity = increased fitness. Application of genetics to preserve species as dynamic entities capable of coping with environmental change (global warming, changing patterns of precipitation, invasive species etc. ) Crossing over modified the original variation in the parents to a possible new one in the offspring. Genetic drift chance loss of alleles in a population = decrease in variation. Gene flow dispersal among populations (emigration decreases genetic variation and immigration increases it) Non-random mating unequal contributions to reproduction, may result from assortative mating (like mates with like) or female choice. Changes in population size especially decrease in population. Locus = location on chromosome where gene is. Gene has 2 or more versions (alleles) Homozygous = same allele for a gene.
