ANT 1 Study Guide - Midterm Guide: Genetic Drift, Founder Effect, Genotype Frequency
Document Summary
When normal body cells divide, chromosomes are doubled. Division results in one copy of each chromosome. Did a lot of experiments with peas, looking at seed color and texture. Hardy-weinberg equilibrium: if no other processes act to change genotypic frequencies, the. Hwe frequencies will be reached after only one generation and will remain unchanged thereafter. q^2 + 2pq + p^2. Hardi-weinberg assumes there is no genetic drift, no mutation, and no migrations. These conditions are impossible all together so hw doesn"t actually exist in world. Selection cannot produce change unless there is variation in the population. Strength and direction of selection depend on the environment. In small populations, genetic drift causes random fluctuations in genetic frequencies. Larger populations get closer to the original 50/50 probability. In small populations, dumb luck can play a role. One day, a deer happens to step on 3 petal flower.
