The incidence of cystic fibrosis, a recessive genetic disorder in the caucasian population of united states, is 1 in every 2,500 individuals. find the number of heterozygous carriers.
(p + q = 1, p2 + 2pq + q2 = 1)

a: 0.0392
b: 0.0254
c: 0.045

Suppose a particular species of tulip plant has three alleles for the gene that codes for flower color. the cr allele produces red tulips, the cp allele produces purple tulips, and the cw allele produces white tulips. cr is dominant over cp and cw, and cp is dominant over cw. for each of the following crosses, determine the expected ratio of offspring for each flower color. cr cp x cp cw cr cw x cp cw 1 red: 1 purple : 0 white, 1 red: 2 purple: 1 white, 2 red: 1 purple 1 white, 1 red: 3 purple : 0 white, 2 red: 0 purple : 2 white, 2 red: 2 purple : 0 white