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Using the Hardy Weinberg principle, calculate the frequency of the heterozygous genotype in the population if the frequency of the dominant allele p is 0.864. Express your answer as a percentage of the population.

p+ 2pq + q= 1.0

p + q = 1.0

1.0 - p = q 

1.0 - 0.864 = 0.136

q = 0.136

Frequency of heterozygous genotype = 2pq

2 x 0.864 x 0.136 = 0.235

As a percentage of the population- 23.5% 

Helen C. A Level Biology tutor, GCSE Biology tutor, A Level Extended ...

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