10 points for 1 question. guys please help I really need it.

​

As a small change in a person's dna can cause a genetic disorder

What’s the student’s scientific question

In a population that is in hardy-weinberg equilibrium, there are two possible alleles for a certain gene, a and a. if the frequency of allele a is 0.4, what fraction of the population is heterozygous? a. 0.40 b. 0.60 c. 0.16 d. 0.48