Geographically isolated subpopulations of a species can evolve partial reproductive isolation in allopatry
If both subpopulations come into secondary contact, they can either fuse into one mixed population, or, dur-ing a process called reinforcement, selection will lead to greater reproductive isolation. The latter will occur if mating with individuals from the other subpopulation reduces an individual's fitness, as the resulting hybrid offspring has lower fitness. Could cultural evolution play a role in reinforcement?
a. Yes, if traits that affect reproductive isolation can be culturally transmitted.
b. Yes, but only if there is zero cultural transmission between subpopulations.
c. No, in order to form separate species, the changes have to be genetic.
d. No, culturally transmitted behavioral traits are bound to be "leaky" (allow for some level of gene flow).
A
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