Why do genes favor shorter lives?

このQ&Aのポイント
  • Scientists have discovered key genes connected to aging, suggesting that people are built to get older, weaker, and eventually die.
  • Contrary to the theory of evolution, the discovery raises questions about why genes don't want us to have longer lives.
  • Genes that favor survival in early life are the ones that really matter, as once an organism has reproduced, its purpose from an evolutionary standpoint is fulfilled.
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和訳をお願いします。

 Recently, scientists have discovered several key genes connected to aging. The discovery suggests that people are built to get older, and weaker, and then to die. This seems rather strange and would appear to go against the theory of evolution. After all, if evolution is so efficient, why don't genes want us to have longer and longer lives? The simple fact is this: the genes that really matter are the ones that favor survival in early life. Once the organism has lived long enough to reproduce, it has served its purpose as far as evolution is concerned. Indeed the human life span has increased over the last hundred years or so, but this increase has nothing to do with our genes, rather with improvements in our lifestyle such as better diets and better health care.  So, from the genes' point fo view, it is vital that we live long enough to reproduce. What happens to us after that is of little concern to them. Thus, genes that make us strong and healthy during our reproductive years are always more valuable, more beneficial than those that may help us live longer.

  • 英語
  • 回答数1
  • ありがとう数1

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回答No.1

   最近、科学者たちは老化に関係のある主要な遺伝子をいくつか発見した。この発見は、ヒトは年を取り、弱くなりやがて死ぬように作られていることを意味する。     これは、妙で、進化の理論に反するように見える。結局のところ、進化がそんなに効果的ならば、遺伝子は、我々がもっともっと長く生きることをなぜ欲しないのか?     この場合、単なる事実は、こうだ、重要な遺伝子とは、一生の始まりに活躍する遺伝子である。一旦生物が子どもを産めば、こと進化に関する限り、お役目は済んだ訳である。    確かに、ここ百年ばかりの間に、ヒトの寿命は延びた。しかしこの延長は、食生活のや健康維持のような生活様式が向上しただけで、我々の遺伝子には何の関係もない。    遺伝子の立場から見れば、生殖機能を果たすまで、生きることが大切なのである。その後どうなろうと遺伝子たちの知ったことではない。したがって、我々の生殖期間中我々を強く健康にする遺伝子は、我々を長く生きさせる遺伝子より、つねに貴重であり有用なのである。

masaf21
質問者

お礼

即答ありがとうございました。ある話の一部分(ボディーの部分)だったのですが、この部分は話の内容と単語が難しく困っていましたが、大変よく話が理解できました。

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