this post was submitted on 17 Jun 2025
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works while as the egg, but not as grown human.
This is not true on multiple levels. One of the benefits of the Crispr technique is it can be used in vivo, so this sort of treatment will potentially be able to be used at any point in an individual's life. But also, trisomy-21 isn't present in sperm or eggs, it's a mistake in cell division early in fetal development, so applying this technique to an egg would have no purpose or effect.