Asked • 07/15/19

How much does the Hayflick limit/telomere length vary across taxa and within humans?

Since they seem to be quite connected, I'm curious if anyone knows of research comparing the Hayflick limit (and presumably by extension telomere length) between different taxa. I've heard the Hayflick limit numbers 40-50 thrown out repeatedly for humans (probably relating to the WI-38 tissue line), but how universal is this really? I Know there are particularly long lived species, but has research been done to correlate this with telomeric length, or do they simply have slower cell division?I suppose it is worth mentioning that a Hayflick limit of 40 rounds of division is massively different from 50, since each round of division conceivably could double the number of cells...

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Justine M. answered • 01/31/20

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