Allelic Frequencies & Population genetics

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  • Created by: J.E.C.
  • Created on: 17-04-14 15:48
Define gene pool?
All the alleles of all the genes of all the individuals in a population at any one time.
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Define allelic frequency?
Number of times an allele occurs within the gene pool.
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In any population, the number of alleles is taken to be...?
1.0
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Give the five conditions of the Hardy-Weinberg principle?
1. No mutations 2.Population is isolated 3. No selection 4. Large population 5.Mating within population is random
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The frequency of the dominant allele tends to be represented by...?
p
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The frequency of the recessive allele tends to be represented by...?
q
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How would you write the equation to determine allele frequency?
p² + 2pq + q² = 1.0
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p + q =
1.0
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If a particular characteristic was the result of the recessive allele, then the frequency is represented by __. If one in 25,000 people has the characteristic how would you determine the frequency of the allele in the population.
q². 1/25000 = q². q = 0.00063. p = 1.0 - 0.00063 = 0.9937. Heterozygous = 2pq = 0.0125. 313 in 25000 carry the allele for the characteristic.
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Card 2

Front

Define allelic frequency?

Back

Number of times an allele occurs within the gene pool.

Card 3

Front

In any population, the number of alleles is taken to be...?

Back

Preview of the front of card 3

Card 4

Front

Give the five conditions of the Hardy-Weinberg principle?

Back

Preview of the front of card 4

Card 5

Front

The frequency of the dominant allele tends to be represented by...?

Back

Preview of the front of card 5
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