Hardy Weinberg Law and Use

Hardy Weinberg idea
- Sexual recombination alone cannot change relative frequencies of alleles or genotypes in population over repeated matings
- i.e. Meiosis alone does not chance overall gene pool
- Therefore changes come from hardy weinberg conditions
Hardy Weinberg Conditions (stated positively, so reflecting the actual condition, not ideal)
- Changes in the gene pool results from:
- emmigration/immigration
- Small population
- Net mutations
- Non random mating
- Natural Selection
- Without conditions above, genotype frequencies and alleles remains the same in the next generation
Hardy Weinberg Probabilities Ex:
p=Dom allele = A=.8
q= Rec Allele= a=.2
- Frequency of allele p or q
- Frequency of genotype=
- P(AA)=.8*.8=.64
- P(aa)=.2*.2=.04
- P(Aa)=(.8*.2)*2=.16*2=.32
- P(Aa) is times 2 because if heterozygous because sperm or egg has to donate one (they have to have one)
- Also P(AA)+P(Aa)+P(aa) must equal one

Author

rica_ross

236844

Card Set

Hardy Weinberg Law and Use

Description

Biology GRE

Updated

2013-09-25T00:03:21Z

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