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jadierhetseni t1_isgwy84 wrote

Reply to comment by sunplaysbass in When it's said 99.9% of human DNA is the same in all humans, is this referring to only coding DNA or both coding and non-coding DNA combined? by PeanutSalsa

Eh. It’s hard to overstate how much of the genome isn’t code-specific. That is, some of it is useless, some of it is structural (need x bases of any sort), some of it is compositional (need a lot of g and c but the precise ratio isn’t important) etc

A lot of the major protein-coding, structural, and regulatory stuff is highly conserved, so there’s a lot of overlap between any two species (Eg humans + bananas)

But all of that other stuff? Eh. It can vary basically as much as it wants consequence-free, producing a lot of within species differences.

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