Applying your knowledge
1. pingelap is a tiny island in the pacific ocean that is part of the federated
states of micronesia. in 1774, a typhoon devastated the island and of the
500 people who inhabited the island, only 20 survived. one male survivor
was heterozygous for a rare type of congenital color blindness. after four
generations, some children were born with complete color blindness and
hypersensitivity to light due to defective cones (achromatopsia). the islands
remained isolated for over 150 years. now there are about 3,000 pingelap
descendants, including those on a nearby island and in a small town on a
third island. the frequency of individuals who are homozygous recessive
and have the disease is 5%, and another 30% is heterozygous carriers. this
compares to the average of 1% carriers for the human population at large
explain the conditions that are responsible for these differences in genetic
frequencies for the pingelap population and the general human population.