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What is the expected number of individuals belonging to the three respective phenotypes/genotypes? Is the population in HW equilibrium?

Genetic testing allows for investigators to distinguish between the three genotypes related to the sickle cell condition. The results from an analysis of members of a small fishing village in South Africa are given below:

Genotype/Phenotype/Number:
Normal-HbAHbA (109)
Sickle cell trait-HbAHbS (12)
Sickle cell disease- HbSHbS (23)

What is the expected number of individuals belonging to the three respective phenotypes/genotypes? Is the population in HW equilibirum? Why or why not?

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