Homework Answers
Evolutionary change in trait can be calculated from heritability and selectio differential.
ΔZ = h2S
Here Z = mean of this trait in the population
ΔZ = change in the mean of trait over one generation
S = Selection differential
In the above question selection ΔZ is given as 2 inches . h2 is given as 0.49. Putting these values in the equation we get -:2 = 0.49 x S
S = -2/0.49 = - 4.1 inches.
Here the change is trait ΔZ is given a minus sign since there is an average decrease in height in the next generation.
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