Assume the Trait for Brown Eyes Is Completely Dominant to Blue

Multiple Choice

Assume the trait for brown eyes is completely dominant to blue eyes and this trait is controlled by a single gene.If 400 people in a population of 10,000 have blue eyes,how many people would be expected to be heterozygous for this trait? (Hint: Use the Hardy-Weinberg formula.)

A) 8,000
B) 5,400
C) 3,200
D) 960
E) 320