Question

The pattern of natural selection where BOTH of the extreme versions of a trait are more advantageous than the average, so a population evolves in both directions away from the average.

Answer 1

Stabilizing Variation.

Step-by-step explanation:

This is the type of variation that occurs when genetic diversity decreases as the population of organism in a particular population based on a specific trait.

Organisms with varied or specific traits within the population are selected against by the selection pressure, with little chances of reproduction, while organisms in between, ( with least variation of this particular traits) which are within the narrow range, survive to reproduce.Thus, this gives rise to narrow population of these particular organisms,(stabilizing variation) which are therefore naturally selected.

Therefore, the variation of the organisms in this population is kept close to the centre of the same mean value.