q11 - okt3

[ArchivalUser]

After graduation, you and 19 friends build a raft, sail to a deserted island, and start a new population, totally isolated from the world. Two of your friends carry (that is, are heterozygous for) the recessive cf allele, which in homozygotes causes cystic fibrosis.

A. Assuming that the frequency of this allele does not change as the population grows, what will be the instance of cystic fibrosis on your island?


B. Cystic fibrous births on the island is how many times greater than the original mainland. The frequency of births on the mainland is .059%.

[ArchivalUser]

A)There are 40 total alleles of the 20 people of which 2 alleles are cystic fibrous causing.

2/40 = .05 the f of the cystic fibrous allele

thus cc or q2 = (.05)2 =.0025 or .25% of the population will be born with cystic fibrous.


B) 0.25/.059 = about 4 times greater occurrence