Question

1. A population of turtles is found where dark shells are completely recessive to light shells (denoted by the alleles a and A). In your survey you captured both dark shelled turtles (452) and light shelled turtles (478). a.) What is the genotypic frequency of light shelled individuals in the population? b.) What is the frequency of the a allele? 2. Suppose in this same population of turtles, a volcano erupts, spewing lava that upon cooling turns the soil surface dark and sooty. Thankfully no turtles were harmed during the eruption. However because of the change in soil color, light shelled turtles are easier to see and therefore more likely to be eaten by predators. 80% of dark shelled turtles survive predation, while only 20% of light turtles survive predation. a.) What is the relative fitness (W) of the aa genotype? b.) Assuming your original allele frequencies above were correct, what is the frequency of the A allele after one generation?

          1. A population of turtles is found where dark shells are
completely recessive to light shells (denoted by the alleles a and
A).  In your survey you captured both dark shelled
turtles (452) and light shelled turtles (478).  
a.) What is the genotypic frequency of light shelled
individuals in the population?
b.) What is the frequency of the a allele?
2. Suppose in this same population of turtles, a volcano
erupts, spewing lava that upon cooling turns the soil surface dark
and sooty. Thankfully no turtles were harmed during the eruption.
However because of the change in soil color, light shelled turtles
are easier to see and therefore more likely to be eaten by
predators. 80% of dark shelled turtles survive predation, while
only 20% of light turtles survive predation. 
a.) What is the relative fitness (W) of the aa
genotype? 
b.) Assuming your original allele frequencies above were
correct, what is the frequency of the A allele after one
generation?

Added by Carolina C.

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