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Old 10-25-2000, 01:07 AM
Opus1 is offline
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Join Date: Apr 2000
Location: Tucson, AZ, USA
Posts: 1,242
It probably has to do with who's raising the children. If two half-siblings share the same mother, they are almost certainly being raised in the same home. If it's the same dad, they may know each other barely or not at all. I'm closer to my half-sister that I share with my mom than my two half-sisters that I share with my dad.

Why this peculiar phenomenon among blacks? Most likely the higher rates of out-of-wedlock births and deadbeat fathers which makes half-siblings and matrilineal lineages more common than among whites.