@rkj123
9 months ago

Which came first - the egg or the chicken?

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This question appears regularly in the question file


In nature, living things evolve through changes in their DNA. In an animal like a chicken, DNA from a male sperm cell and a female ovum meet and combine to form a zygote -- the first cell of a new baby chicken. This first cell divides innumerable times to form all of the cells of the complete animal. In any animal, every cell contains exactly the same DNA, and that DNA comes from the zygote.

Chickens evolved from non-chickens through small changes caused by the mixing of male and female DNA or by mutations to the DNA that produced the zygote. These changes and mutations only have an effect at the point where a new zygote is created. That is, two non-chickens mated and the DNA in their new zygote contained the mutation(s) that produced the first true chicken. That one zygote cell divided to produce the first true chicken.
Prior to that first true chicken zygote, there were only non-chickens. The zygote cell is the only place where DNA mutations could produce a new animal, and the zygote cell is housed in the chicken's egg. So, the egg must have come first.
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The chicken. If it is not the chicken that comes first then there will be no egg. After all, chicken starts with the letter 'c' and egg with the letter 'e'. C will always come before E.
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I am on Team Egg
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The egg came first, and then it hatched a chicken.
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The dinosaurs, which later became chickens. So the questions can be reformulated, but I have no clue.

It is a question similar to the missing link between man and monkey: as the evolution is continuous (the single steps are the lives of the individuals, so there is a certain degree of discretization, but still) we can always find something in the between two species.
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Chicken ;)
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I think it's just an unanswerable question, because nobody can truly know the correct answer.
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Chicken is first
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I would say the egg can first .
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the enzymes that created both sexes chickens and then we all know what comes next!!! :)
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