In the Caucasian population of North America, one out every 10 000 babies is born with a recessive ...

In the Caucasian population of North America, one out every 10 000 babies is born with a recessive condition known as phenylketonuria (PKU). This condition is controlled by a single pair of alleles. People who are homozygous recessive for the PKU gene completely lack the enzyme that is necessary to metabolize the amino acid phenylalanine into harmless by-products. The presence of the amino acid in a baby's diet can slow the development of the baby's brain. What percentage of the Caucasian population of North America would you expect to be heterozygous for the PKU allele?

I got 0.0198 or 2.0%