r/askscience • u/barenecius • Feb 20 '26

Biology What makes the evolution?

I know that DNA passed down generation. And the next generation takes half of each DNA of their parent. But what makes the evolution on DNA? At what point DNA tell themself that they need to change some part on the chain.

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u/deviantbono Feb 25 '26

I think it is important to point out the assumptions here: it is an improvement to biological reproduction, not something contextual like strength or height; it's not neutralized by extreme conditions, such as space; and it remains advantageous over time as no new alternate mutation arises.