9) A researcher studying a population of grasshoppers finds a genetic translocat

Question

9) A researcher studying a population of grasshoppers finds a genetic translocation on the chromosomes of some members of the population. To predict the frequency of the translocation in the coming years (generations) she conducted laboratory experiments to estimate the viability of the 3 genotypes. Below are her data.

Fitnesses of translocation (T) and wild-type (t) genotypes

  T/T T/t t/t

viability

0.5 0.3 0.4

relative fitnesses

W11=   W12=   W22=

Calculate the relative fitnesses (hint: divide by highest viability)

Explanation / Answer

Relative Fitness (W) is the survival and/or reproductive rate of a genotype (or phenotype) relative to the maximum survival and/or reproductive rate of other genotypes in the population.

W11 = 0.5 / 0.5 = 1.0

W12 = 0.3 /0 .5 = 0.6

W22 = 0.4 / 0.5 = 0.8

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