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Joined 1 year ago
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Cake day: November 12th, 2023

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  • If you want to insist on a definition that says egg and sperm cells aren’t alive, or aren’t an organism, you’re gonna have a hard time saying that a fertilized egg or an embryo are. They don’t replicate on their own, either, not without a very specific environment and set of stimuli.

    An embryo goes from a single cell to multiple genetically identical cells, that is replication. Sperm cells do not replicate into more identical sperm cells, eggs do not replicate into more identical eggs.

    Also, sperm cells DO replicate, to an extent. They undergo forms of mitosis and meiosis, during their growth. And an egg cell absolutely replicates. Like any other type of cell replication, it needs certain stimuli to initiate it. I.E. it needs to be fertilized.

    I would argue that the mitosis process sperm cells undergo splits the cell into two genetically different cells and the genetic difference ia not a mutation so it’s not replication. Egg cells don’t replicate they don’t copy their DNA, they fuse with sperm at which time they become an embryo and start to replicate.


  • You should probably read the articles before you comment on what’s in them. It may also help to know what replication means.

    “Any system capable of replication and mutation is alive” to Schulze-Makuch et al. 2002:

    (3) able to replicate structurally distinct copies of themselves from an instructional code perpetuated indefinitely through time despite the demise of the individual carrier through which it is transmitted.

    Forterre, Patrick, 2006a, “Three RNA cells for ribosomal lineages and three DNA viruses to replicate their genomes: a hypothesis for the origin of cellular domain,” Proceedings of the National Academy of Sciences, 103(10): 3669–3674.