Hardy-Weinberg Model Video Lessons

Concept

# 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

###### 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.