- Sep 2022
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bio.libretexts.org bio.libretexts.org
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if individuals of the two populations were to be brought together, mating would be less likely, but if mating occurred, offspring would be non-viable or infertile.
Is it possible for two populations to create infertile offspring that mutate enough to become fertile again?
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bio.libretexts.org bio.libretexts.org
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Another scenario in which populations might experience a strong influence of genetic drift is if some portion of the population leaves to start a new population in a new location or if a population gets divided by a physical barrier of some kind
As we continue mass amounts urbanization and human exploitation of natural resources, I think that it is likely that more bottleneck events will be induced. This will likely result in genetic drift across many different species. So, it would not be surprising if we have already caused mass change in phenotypes/genotypes among many different organisms.
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bio.libretexts.org bio.libretexts.org
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The change in frequency resulting from mutation is small, so its effect on evolution is small unless it interacts with one of the other factors, such as selection
Is it possible for selection pressure to cause organisms to mutate at a higher rate?
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bio.libretexts.org bio.libretexts.org
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evidence of evolution is the convergence of form in organisms that share similar environments
As the average temperature of earth continues to rise, I think that we will see a lot of species adapt to changing environments due to immense selection pressure. While it is extremely sad to see so many ecosystems altered in such a short timeframe, these phenomena will serve as excellent examples of darwinism. Only the strongest will adapt in time in order to continue the species.
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