The Hardy-Weinberg Theory
Cyberbiology



Links
Here's a pretty good link to help you learn more about population genetics and Hardy-Weinberg. It's called the "Gene School"

 

mendel.gif (80955 bytes)Darwin_old.gif (33552 bytes)Population Genetics: Darwin Meets Mendel

Why did Mendel's findings fit in so well with Darwin's?

Define Population Genetics.

An Introduction to Hardy-Weinberg Theory

According to the Hardy-Weinberg theory, in a randomly mating population with no evolution or selection, the relative gene frequency will __________ from generation to generation. (change or stay the same?)

The Hardy-Weinberg Equation

Know this... inside & out!

p + q = 1

p2 + 2pq + q2

 

Example using the Alleles "A" and "a":
AA + Aa + aa  

 

What is the Hardy-Weinberg equation good for?

You may want to listen to the next lecture before answering...

What does p stand for?

What does q stand for?

What must p + q =  ?

Match them: 

  • homozygous dominant, heterozygous, homozygous recessive
  • p2    2pq     q2  

What must p2 +  2pq +  q2   =  ?

Using the Hardy-Weinberg Theory

Follow his example... when I ask one on the test it will be similar to this Tay Sachs problem. Time to whip out those calculators!

Using the Hardy-Weinberg Theory - Part II

Here's another problem to work out with Dr. Wolfe.

Hardy-Weinberg: What Does This Have to Do With Evolution?

At first it appears silly to use the Hardy-Weinberg equation because it is based on non-evolving populations. Why is it actually a very useful equation/theory?

List (and know) the five criteria needed to maintain a population at Hardy-Weinberg equilibrium.

Define microevolution.