The purple sea star, Pisaster ochraceus, lives in rocky intertidal and subtidal habitats along the U.S. west coast.
Originally it was thought to be a distinct species from a similar orange sea star that lived in the same habitat, until genetic analyses confirmed that the two are simply different color morphs of the same species.
Let's assume that color is located on a single gene, with the purple allele dominant over the recessive orange allele.
When sampling the population at Seal Rock, OR, you find 24 orange individuals among a population of 60 total P. ochraceus sea stars.
What is the frequency of the orange allele?
a. 0.40
b. 0.48
c. 0.63
d. 0.69