Giant Kangaroo Rat have particularly large hindfoot lengths to allow them to jum

Question

Giant Kangaroo Rat have particularly large hindfoot lengths to allow them to jump high thereby escaping predation. A group of researchers visited the population in 2014 and found heritability of hindfoot length to be 0.75. The same group of researchers revisited the population in 2018 and discovered the heritability was much higher than before while the selection differential remained the same. What do you expect the response to selection to be in 2018 compared to the response to selection in 2014?

Explanation / Answer

We have heritability(h2)= R/S

where, R is response to selection and S is Selection differential.

Since, the selection differential remained the same in 2018,

we can say that,

h2 increases proportionately with R.

Hence, the response to selection is expected to have increased very much, in direct proportion to heritability.

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