DNA replication is imperfect, and we have plenty of spellcheckers in our cells. But mutations arise, mostly single changes, occasionally chunkier sections of DNA. Withouit them, no evolution would occur, for there would be no variation on which selection could act. From an evolutionary point of view, perfection is boring and impractical, and infidelity is essential, at least when it comes to the code. The process of DNA replication has to be imperfect. You have acquired through nothing other than chance at least 100 mutations that are unique to you. If you have children, you may well pass them on to your children, and they will acquire plenty of their own. As long as humans keep having sex and that sex results in more humans, then we are evolving. We can avoid these evolutionary changes no more easily than we can change the weather.
Friday 1 November 2019
DNA replication is imperfect, and we have plenty of spellcheckers in our cells. But mutations arise, mostly single changes, occasionally chunkier sections of DNA. Withouit them, no evolution would occur, for there would be no variation on which selection could act. From an evolutionary point of view, perfection is boring and impractical, and infidelity is essential, at least when it comes to the code. The process of DNA replication has to be imperfect. You have acquired through nothing other than chance at least 100 mutations that are unique to you. If you have children, you may well pass them on to your children, and they will acquire plenty of their own. As long as humans keep having sex and that sex results in more humans, then we are evolving. We can avoid these evolutionary changes no more easily than we can change the weather.
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