Eli5 why genetic diversion between several groups of people is less than within one

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I saw it mentioned in several books that, for example, I’m (as a human, who I totally am) more genetically diverse to people living in my country than to people living across the ocean. How can you explain it or did I just get it wrong? My brain (of course only one, as we all have) can’t understand it, because the opposite seems more reasonable.

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In: Biology

2 Answers

Anonymous 0 Comments

> (as a human, who I totally am)

love it, haha

They mean that to define a type of population, you establish averages. If you average the height of every American and compared that to the height of every Brazilian, you’d see that on average people in the US are taller than people in Brazil. There’s a genetic component to that and it explains the delta.

The part you’re asking about however, is that within America, the range of possible human heights is massive. Even though Shaquille O’Neal is American, the difference between his height and my height is far larger than the difference between the average American height and the average Brazilian height, or even between my height and any given random Brazilian.

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