Hardy-Weinberg Model Video Lessons

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Problem: In a given population, only the "A" and "B" alleles are present in the ABO system; there are no individuals with type "O" blood or with O alleles in this particular population. If 200 people have type A blood, 75 have type AB blood, and 25 have type B blood, what are the allelic frequencies (p and q) of this population? Assume type A blood= p and type B blood= q.

FREE Expert Solution

To get the allele frequency of A and B, remember that blood types are determined by three alleles A, B, O and that codominance with A and B may occur. So, in order to get A and B allele we need to use the Hardy Weinberg Expression: 

A allele = p2 + 2pq / total population x 2

B allele = q2 + 2pq / total population x 2


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Problem Details

In a given population, only the "A" and "B" alleles are present in the ABO system; there are no individuals with type "O" blood or with O alleles in this particular population. If 200 people have type A blood, 75 have type AB blood, and 25 have type B blood, what are the allelic frequencies (p and q) of this population? Assume type A blood= p and type B blood= q.


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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Hardy-Weinberg Model concept. You can view video lessons to learn Hardy-Weinberg Model. Or if you need more Hardy-Weinberg Model practice, you can also practice Hardy-Weinberg Model practice problems.

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Based on our data, we think this problem is relevant for Professor Rosby's class at LSU.