Hello everyone, I'm new here, I'm a lot interested by genetic and I fallen on this wonderful forum.

I come on this forum because I always wanted to have an answer on this question:

Why there are a lot of physical differences between populations who are supposed to have the same haplogroup?
For example, if we take an english and a spanish (they're both in majority (+/- 60%) part of the R1B1 haplogroup) but they've not at all the same physical spanish are black hair and english brown/blond hair, spanish have a very specific and typical physical.

So why this "extrem" variety of physical between people who have the same haplogroup ? The physical is maybe not linked to the haplogroup ?

Sorry if my question is a little strange.