[QUOTE="GabuEx"][QUOTE="BumFluff122"]How would a particular mutation today spread over the entirety of the Earth? It would be very hard and most likely wouldn't occur then. I've read various books on this and I've even read Darwin's books on natural and sexual selection. I just can't grasp how humans would evolve into something other than modern humans on such a massive scale. What do you think would occur if there was a small group of people who;s malformed genes began spreading throughout a community?Fyrhtu
Why, exactly, would a particular mutation need to spread over the entirety of the Earth? Evolution never suggests that it would. Indeed, two animals in different environments may very well evolve in entirely different ways, because different environments affect what qualities increase or decrease an animal's chance at survival. The difference in skin tone in humans as you go further north is a pretty good example of that - skin with a lot of melanin in it decreases a human's risk of skin cancer, but at the same time, increases a human's risk of being vitamin D deficient. In a place near the equator, skin cancer is much more likely to be problematic, whereas in a place far from the equator, not so much.
Sickle-cell anemia is another good example of this. A human with full-on sickle-cell anemia has a drastically lessened life expectancy, so normally one would expect people with it to die out. However, those who are carriers of the sickle-cell genes, but do not have the disease itself, have a much higher resistence to malaria, so in regions of the world where malaria is a strong cause of death, the gene for sickle-cell anemia can actually be beneficial. However, in regions not susceptible to malaria, this is not the case.
Evolving can be very deceiving to certain people. Does it mean... a orgasm growing to a more mature form? or something entirely different?1. Someone's been playing too much Pokemon. :x
2. Hee hee hee.
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