Do arranged marriages tend to lead to endogamous relationships and reduce genetic diversity?
Arrange marriage does not necessary mean marrying someone from the same society or group as you are. It means marrying some one that is recommended by your family or met through your family. But it is true that in most society that have arrange marriages where the couple are from the same group, the genetic disorders increase because in such arrange marriages, if one partner has a variant gene the risk that the other has it too is far higher, more like one in eight, thus passing the illness to their children also increases! Hope this helps!
