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AL1L30736yEvolutionary speaking, the egg came first because the hatched egg from some other species was the first chicken.
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devios157016y@AL1L However isn’t the egg produced by the mother and therefore would be of her species? Thus the chicken would hatch from a non-chicken egg? 😉
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devios157016y@AL1L You missed my point: if the egg is the genetic material of the mother, then it couldn’t come first because it wouldn’t be a chicken.
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devios157016y@AL1L The genetic mutations happen in the living animal though, not the egg. Therefore if the mother was not a chicken, neither is her egg a chicken egg (offspring don’t produce their own eggs, they come FROM an existing egg that is then fertilized). Therefore you can’t say the egg came first because we have the first chicken existing before the first chicken egg.
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devios157016y@AL1L That’s where it breaks down I suppose: you need to know who was responsible for that mutated gene. It could have just as easily come from the father.
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devios157016y@AL1L There’s no reason to assume the mutation happened during its own development. It could have developed that mutation while replicating sperm cells. Any time DNA is copied it has the potential for mutation.
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AL1L30736y@devios1 with the replicating sperm cells, that means it happened to the offspring first, therefore the father was not a chicken and the sperm made the egg the first chicken.
There are many reasons why the mutation happened in the egg/sperm creation, because of what you said, any time DNA is copied it has the chance to mutate. And in the creation and transfer of sperm/egg and the growth of the egg, there is the most DNA coppying that is disconnected from the parent.
You cant mutate a cell in the head of the parent species for it to be transfered to the egg, so any mutation would have had to come from the creation of the egg. -
devios157016y@AL1L The point is if scientists can’t agree on it, I don’t think we’re going to. I’m just pointing out it’s not as clear-cut as you seem to think. Also I’m no biologist but I don’t believe the act of fertilizing an egg *changes* the DNA in the egg as you seem to be saying, since it necessarily developed prior to it being fertilized and therefore has the DNA exclusively of its mother.
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devios157016y@AL1L I think we should just go back to JavaScript’s answer and leave the rest to the scientists. 😂
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@devios1 This whole argument is based on the assumption that the concept of a chicken is a well defined box, whereas evolution works in gradients. It's akin to asking when the hill will become a mountain if all you are doing is adding one grain of sand. When do you tell them apart?
Each child will not be of much difference compared to their parents, yet evolutionary drift and mutations is causing that if you inspect individuals thousands of generations apart, that those look oddly different.
That doesn't change the fact that a "not-quite-chicken" will have layn eggs for the "actual chicken" first. -
devios157016y@k0pernikus Of course. All of this assumes you could draw such a line, such as if you could mark the very gene that identifies the point it became a chicken—because it’s obviously quite impossible otherwise. I realize it’s more of a philosophical question. 🙂
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