My AP Biology Thoughts15 Jan 2021

Hardy-Weinberg Theory

Welcome to My AP Biology Thoughts podcast, my name is Nikki and I am your host for episode #6 called Unit #7 Evolution: Hardy Weinberg Equilibrium.. Today we will be discussing the conditions for a Hardy Weinberg equilibrium, the importance of it, and the equation used to find the characteristics of it

Segment 1: Introduction to Hardy Weinberg

Hardy Weinberg is the use of equations to find out allele and genotype frequencies in a population if Evolution didn’t occur.
This allows us to see what the population should look like without evolution
Dominant vs recessive(p or q)
P and q
q^2 and q^2
p+q+1
p^2+q^2+2pq=1

Segment 2: More About the Hardy Weinberg Theory

So when do we use these equations? Well to use Hardy Weinberg, there can’t be any evolution taking place

Let's remember the 5 fingers of evolution

Genetic drift- little genetic variation, random non-adaptive changes due to random event
Bottleneck or founders
No random events and no migration to new areas
Bison being hunted and now little genetic variation
Non-random mating/ sexual selection
Peacocks with larger and brighter feathers
Mutations
Mutation changing fur color to a totally different color
Gene flow-bring alleles together
Purple bird
Natural selection-non-random adaptive changes
finches

Uncoincidentally the 5 requirements for Hardy Weinberg is

No genetic drift
No sexual selection
No mutations
No gene flow
No natural selection

Segment 3: Connection to the Course

How does this topic fit into the greater picture of evolution?

This topic helps us see a population without evolution

Then, comparing to the actual population with evolution, and there are differences between the hardy weinberg and actual, that shows evidence of evolution as well as how evolution effects

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