Question

In a given population, the A allele is at a frequency of 0.8, and the a allele is at a frequency of 0.2. Assuming Hardy-Weinberg equilibrium, what should the frequency of A/A homozygotes be in the population? Select one: a. 0.8 b. 0.16 0.32 d. 0.64 e. 0.064 O c.

          In a given population, the A allele is at a frequency of 0.8, and the a allele is at a frequency of 0.2. Assuming Hardy-Weinberg equilibrium, what should the frequency of A/A homozygotes be in the population? Select one: a. 0.8 b. 0.16 0.32 d. 0.64 e. 0.064 O c.
        
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Biology for AP Courses
Biology for AP Courses
Julianne Zedalis, John Eggebrecht
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In a given population, the A allele is at a frequency of 0.8, and the a allele is at a frequency of 0.2. Assuming Hardy-Weinberg equilibrium, what should the frequency of A/A homozygotes be in the population? Select one: a. 0.8 b. 0.16 0.32 d. 0.64 e. 0.064 O c.
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Transcript

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00:01 We have some allele frequencies.
00:02 The dominant is 0 .4, the recessive is not .6.
00:07 If the population is at hardy -weinberg equilibrium, what is the frequency of heterozygotes? okay, when you see hardy -winberg, you're almost certainly going to be using these two equations.
00:18 So they're worth writing out.
00:21 They look like this.
00:24 So these are the hardy -weinberg equations.
00:26 This top one is for allele frequency.
00:29 Every copy of the gene is one of these two alleles.
00:32 So if you add up their frequency, you'll get 100%.
00:35 And you can see this holds true.
00:37 60 % of the copies are recessive, 40 % are dominant.
00:42 This one is for genotype frequency...
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