Is Evolution Random? - 12 Days of Evolution #2
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[MUSIC] This episode was sponsored by Dropbox [MUSIC] [BIRD CHIRP] Some people think nature is like a tornado that picks up a pile of raw materials and then spits out a palace. But nature doesn’t work that way. Copying DNA, UV rays, chemicals, the shuffling of genes, all introduce tiny changes, and those changes are random. But natural selection is anything but random. An organism builds its house using DNA blueprints. But when it copies those blueprints, they’re a little different thanks to that random genetic variation. When construction begins, Some of the houses that get built fall down. Some of the houses aren’t better or worse just different. But some of the houses turn out even better! The blueprints for the houses that stay standing get put back in the genetic shuffling mac...
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[MUSIC] This episode was sponsored by Dropbox [MUSIC] [BIRD CHIRP] Some people think nature is like a tornado that picks up a pile of raw materials and then spits out a palace. But nature doesn’t work that way. Copying DNA, UV rays, chemicals, the shuffling of genes, all introduce tiny changes, and those changes are random. But natural selection is anything but random. An organism builds its house using DNA blueprints. But when it copies those blueprints, they’re a little different thanks to that random genetic variation. When construction begins, Some of the houses that get built fall down. Some of the houses aren’t better or worse just different. But some of the houses turn out even better! The blueprints for the houses that stay standing get put back in the genetic shuffling mac...
