Question: Achondroplasia is a dominant trait that causes a characteristic form of dwarfism. In a survey of …

Achondroplasia is a dominant trait that causes a characteristic
form of dwarfism. In a survey of 1.5×105 births, 20 infants with
achondroplasia were identified. Of these affected infants, 13 had
affected parents, while 7 had normal parents. Calculate the
mutation rate for achondroplasia and express the rate as the number
of mutant genes per given number of gametes. Round your
answer to six decimal places.