Variation in shell coloration occurs in a local population of snapping turtles, and shell
coloration is controlled by the Carapace gene. Interestingly, shell coloration is not linked with
either survival or reproductive success in the population. Do you expect the population to
evolve via natural selection (at this gene)?
No, selection will never occur if phenotypic variation does not affect survival.
No, selection will never occur if phenotypic variation does not affect reproductive success.
Yes, selection will always occur if phenotypic variation is underlain by genetic variation.
