Chapter 18 Notes

Chapter 18 Notes - M icroevolution 5 conditions of Hardy...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Microevolution 5 conditions of Hardy Equilibrium Hardy Weinberg principle is in effect if the following 5 conditions are met 1. No mutations: allele changes do not occur; changes balanced 2. No gene flow: no migration of alleles into or out of population 3. Random mating: individuals pair by chance; not according to genotypes or phenotypes 4. No genetic drift: population is large; changes in allele frequencies are insignificant 5. No selection: one genotype is not favored over another These conditions are rarely, if ever, met; do change from generation to the next Evolution has occurred! Hardy Weinberg tells us WHAT CAUSES evolution Microevolution: accumulation of small changes in the gene pool over a short period of time 5 causes of Microevolution 1. Genetic Mutations: raw material for evolutionary change; polymorphic – 2 or more distinct phenotypes are present due to mutated genes ex. freckles or no freckles ex. ABO blood types; mutations do not immediately affect phenotype – may not be detected; recombination of alleles increases the possibility of favorable phenotypes
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

Chapter 18 Notes - M icroevolution 5 conditions of Hardy...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online