It turns out that the black coloration on the wing makes these butterflies look less like a flower, making them more easily detectable by birds. This, sadly, leads to the black butterflies being eaten. What type of evolution is this, and how will this impact genetic variation in this population of Heliconius butterflies?
This will not cause the population to evolve, so there will be no impact on genetic variation within the population.
This will cause a bottleneck, leading to increased genetic diversity.
This is an example of a founder effect and will lead to decreased genetic diversity.
This is an example of a founder effect and will lead to increased genetic diversity.
This is an example of directional selection, and will lead to reduced genetic diversity.