Hardy-Weinberg Theory

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Hardy-Weinberg

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 

Thank you for listening to this episode of My AP Biology Thoughts. For more student-ran podcasts, make sure that you visit www.hvspn.com. Thanks for listening!

Music Credits:

“Ice Flow” Kevin MacLeod (incompetech.com)

Licensed under Creative Commons: By Attribution 4.0 License

http://creativecommons.org/licenses/by/4.0/

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