A dwindling population of 1000 frogs occupies an isolated wa

A dwindling population of 1000 frogs occupies an isolated watershed in Costa Rica. To help preserve the species, scientists caught 20 frogs to start a new population in a nearby watershed. This species has a gene that affects eye shape. The 1000-member wild population has two alleles for this gene: R and r, with frequencies 0.7 and 0.3, respectively. What will be the allele frequencies of R and r in the 20-member founder population? The frequencies will be 0.7 for R and 0.3 for r. The frequencies will be 1.0 for R and 0 for r. The expected frequencies are 0.7 for R and 0.3 for r. The actual frequencies could be different. The founder populations\'s allele frequencies will necessarily be different than the source population\'s frequencies.

Solution

Answer C) The expected frequencies are 0.7 for R and 0.3 for r. The actual frequencies could be different.

Reason: As we really don\'t know about which frogs are actually caught ( no information about their genotype). so, we can only expect that the allele frequencies in the founder population (caught 20 frogs) must be similar to their parental population such that expected frequency of R = 0.7 and expected frequency of r = 0.3.