Why doesn’t the epistatic or interactive variance of a phenotype contribute to i

Question

Why doesn’t the epistatic or interactive variance of a phenotype contribute to its response to selection?

a. this variance is neutral with respect to fitness

b. this variance is dependent on the environment and therefore contributes to the phenotype differently in various environments

c. this variance is dependent on the genetic background and therefore is neutral with respect to fitness

d. this variance is independent from the genetic background and therefore is neutral with respect to fitness

e. this variance is dependent on the genetic background and therefore contributes to the phenotype differently in the parent and offspring

f. this variance is independent from the genetic background and therefore contributes to the phenotype differently in the parent and offspring

Explanation / Answer

Answer: e. this variance is dependent on the genetic background and therefore contributes to the phenotype differently in the parent and offspring

Explanation: In epistasis, the effect of a gene is dependent upon another gene. The effect of epistatic changes is non-linear.

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