Question

Which of the following will decrease the response of a trait to natural or artificial selection? Which of the following will decrease the response of a trait to natural or artificial selection? Increased narrow sense heritability (h2). Greater selection strength (S). Lower additive genetic variance (VA). Increased broad sense heritability (H2).

Answer 1

Lower additive genetic variance (VA)

Step-by-step explanation:

The Increased narrow sense heritability (h2) will increase the additive genetic varience thus increasing response for natural selection, because,

h2 =
`\frac{\textup{VA}}{\textup{VP}}`

here,

VA = Additive genetic varience

VP = Phenotypic variation.

Similarly, the increase in the selection strength will increases the response of a trait to natural/artificial selection.

Thus, if additive genetic variance (i.e VA) is low, it decreases the response of trait for selection.

Hence, The correct option is Lower additive genetic variance (VA)