A classic example of natural selection is the population-level change in the col

ID: 178435 • Letter: A

Question

A classic example of natural selection is the population-level change in the color of peppered moths during the Industrial Revolution. Color in the peppered moth is autosomal recessive. The dark coloration is dominant, D, and the light coloration is recessive, d. Suppose a population of peppered moths includes 23 light-colored moths, 75 heterozygous, dark-colored moths, and 121homozygous, dark-colored moths. Calculate the fitness of the light-colored moths, wdd. Express w to the nearest thousandth

Explanation / Answer

homozygous, dark-colored moths

heterozygous, dark-colored moths

light-colored moths,

121

Survival rate

121 /219=0.55

=55%

75/219=0.34=34%

23/219=0.10=10%

Relative fitness (w)

55/55= 1

34/55 = 0.618

10/55=0.181----------------answer

Relative Fitness (w) :

it can be referred as the survival rate of a genotype or phenotype) relative to the maximum survival rate of other genotypes in the population.