Question

Over generations, female reindeer in a Finnish population give birth to larger offspring. Which type of selection is occurring, and how would a distribution curve for this trait change over time?(1 point)

stabilizing selection; the curve would become taller in the middle

directional selection; the curve would shift to the left

directional selection; the curve would shift to the right

stabilizing selection; the curve would become shorter in the middle

Answer 1

directional selection; the curve would shift to the right

Rationale: Selection favors larger offspring, so the population mean body size increases over generations and the frequency distribution shifts toward larger values.