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Hardy-Weinberg: Blood Type Calculations

APBIO-WENEY5

One way to classify humans is by their blood type. There are over two dozen ways to group blood types. One of them is by the presence of the D antigen on the surface of blood cells. If an individual expresses the D antigen, they are referred to as Rh positive. This is controlled by an autosomal dominant allele. In a given town, 16% of the population is considered Rh negative.

If this town's high school has 2,000 students, how many would you expect to have the homozygous recessive genotype?

A

160

B

320

C

480

D

720