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Re:Scientists found genetic mutations in every astronaut blo... by gus_massa on Friday September 09, 2022 @02:53PM (#32783368)
There are some tricks to reduce the number of important mutations.

Germinal cells reproduce very slowly, so the eggs and sperm have fewer mutations.

Also, cells inside the guts have some cascade method. The cells near the wall reproduce very seldom, but the intermediate cells reproduce faster, and the inner cells reproduce even faster. The inner cells that are reproducing fast die or get washed away, so the big number of possible mutations is removed. And the slow reproducing cells near the wall create more cells to replace the intermediate cells that replace the inner cells.

Re:Scientists found genetic mutations in every astronaut blo... by lanstin on Friday September 09, 2022 @08:33PM (#32786513)
Cool, that makes sense but I'd never seen it framed this way. (I knew about the slow rate for germ cells, but not gut.).