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Re: The British Secret Serv...

Celaeno
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SubjectRe: The British Secret Service...[was Re: Republicanism still an offence in Eng
FromCelaeno
Date2002-05-06 01:35 (2002-05-06 01:35)
Message-ID<3cd5481e.4338519@news.world-online.no>
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Newsgroupsalt.fan.tolkien
FollowsHenriette Frans
FollowupsHenriette Frans (6h & 6m) > Celaeno
You will not evade me, Henriette Frans <ch.frans@chello.nl>:

Henriette Frans
Celaeno wrote:

Celaeno
You will not evade me, Henriette Frans <ch.frans@chello.nl>:

Do you know something about a geographical spreading of Rh- blood?

See, those things I don't remember. I just read an article the other day about AB0 distribution, but it's been a while since I've seen something about the Rhesus factor distribution. I seem to recall Rh- being prevalent either in Native Americans or certain Asian peoples.

Henriette Frans
I think ?jevind said that and also mentioned the African people. As it is your hobby,

You're mistaking hobby with interesting thing :)

and I'm still looking for some answers like why Rh+ babies of Rh- mothers often died and why nature never developed a solution for that. Maybe Rh- is relatively new to a formerly Rh+ population in certain parts, but if it is why do so many people have Rh- recessive genes.

Same reason as hemophilia still exists, I guess - being recessive, it's carried unnoticed by people who also carry the dominant trait, so even if it did kill all children where the mother has antibodies against the child's blood (it doesn't), it'd still be passed down that way. The disease is caused when the mother's blood contains large amounts of antibodies against the child's bloodtype, and the most common happens to be antibodies against Rh-. A type people can have B antibodies, B type people can have A antibodies, and 0 people can have A and B antibodies. The antibodies are triggered by carrying a child with the 'wrong' bloodtype or by receiving the 'wrong' bloodtype in a transfusion - after that, the next baby or transfusion gets messed up, with the antibodies making the alien bloodtype begin to coagulate. There are tons of different bloodtype systems, it's just that AB0 and Rh are the best known and that Rh factor is the most common trigger by far for this particular disorder. (Rh factor is actually 4 different factors and it's the 4th that gives the + or - that 'counts', so when you're being tested for Rh+/-, it's often labeled as being tested for D+/-)

What did the article say about ABO distribution?

I'd tell you if only I could find the thing... it went into some theories about human migration patterns based on it.

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