BioLect5 - 1 Lecture 5 Hardy-Weinberg Equilibrium and...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

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

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

Unformatted text preview: 1 Lecture 5 Hardy-Weinberg Equilibrium and Mechanisms of Evolution Odds and Ends Monday Finish CH 23 (natural & sexual selection) + some of HW practice problems CH 24 Wednesday Mastering Biology website folder includes link to website and directions for logging on, I did not set up a course ID Recommend Mastering Biology Exercises for CH23 Activity 23.1-sexual recombination video Activity 23.2-Practice HW Activity 23.3-Mechanisms of evolution Hardy-Weinberg Equilibrium Assumptions Both allele and genotype frequencies remain constant across generations if: 1. Mating is random 2. Mutations do not occur 3. There is no genetic drift (book "large population size" 4. There is no migration (aka "no gene flow") 5. There is no natural selection Road Map: Five Means of Evolution 1. Non-random mating 2. Mutations 3. Genetic drift 4. Migration = gene flow 5. Natural selection sexual selection + 2 Non-Random Mating 1. Assortative Mating positive assortative mating = preferring same genotype inbreeding - mating with genetic relatives is one form of positive assortative mating negative assortative mating or disassortative mating = preferring different genotype 2. Sexual Selection (later) =Aa OR (+) aA From Punnett squares 1. all frequencies must sum to 1 2. AND = MULTIPLY 3. OR = ADD Random Mating Road Map: Five Means of Evolution 1. Non-random mating 2. Mutations 3. Genetic drift 4. Migration = gene flow 5. Natural selection sexual selection + Mutations mutations alone = small effect (unless really small population) but with natural selection across generations = BIG EFFECT 2 Non-Random Mating 1. Assortative Mating positive assortative mating = preferring same...
View Full Document

Page1 / 9

BioLect5 - 1 Lecture 5 Hardy-Weinberg Equilibrium and...

This preview shows document pages 1 - 3. Sign up to view the full document.

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