Question: Why is it that Eskimos often get haemophilia?

Josh Meyers answered on 25 Jun 2015:

Haemophilia is a really interesting disease! It occurs when a person has low levels of coagulating factors in their blood. This is a genetic disorder and is often inherited. The genes for these factors are on the X chromosome. So it is much more common in men (because we only have one X chromosome whereas women have two).

Because this is an inherited disorder, it is commonly found within certain population demographics because throughout history, people have tended to breed within their social and geographic groups.

However I have not found anything about haemophilia being prevalent among the eskimo community (where did you hear that?!). It is known to be a problem among eastern european jews though.