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Genetics: Blood Grouping and Codominance

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APBIO-YHWX4V

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 dominant genotype?

A

320

B

720

C

960

D

1,680