Question a (4 pts). A population of poisonous frogs is sampled and assessed for

Question

Question a (4 pts). A population of poisonous frogs is sampled and assessed for skin color. Skin color is determined by alleles at one locus; allele "C" is for Blue skin and allele "c" is for red skin. "C" is completely dominant to "C" Assume that this population is in Hardy-Weinberg Equilibrium and that the population's features and the locus for skin color satisfy the assumptions for the H-W Law. From a population of 462 poisonous frogs, 174 frogs have blue skin and 288 frogs have red skin. a. What is the frequency of the allele for red skin, allele "c"? b. What is the frequency of allele C? c. What is the expected frequency of the "cc" genotype in the next generation of that population d. What is the expected frequency of the "Cc" genotype in the next generation of that population?

Explanation / Answer

a). Total frogs = 462

No of Red skin frogs = 288= frequency= 0.62=0.6

Allele frequency of red skin frogs, c = 288/462 = 0.6

?b). Total frogs = 462

No of Blue skin frogs =174

Allele frequency of blue skin frogs, C= 174/462 = 0.4

c) The probability of an c meeting an c is 0.6 x 0.6 = 0.36

   The expected frequency of genotype “cc” in the next generation = 0.36

d). The probability of an C meeting an c is 0.4 x 0.6 = 0.24.

   The probability of an c meeting an C is 0.6 x 0.4 = 0.24.

There fore , The expected frequency of genotype “Cc” in the next generation = (0.24 +0.24) = 0.48

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