Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site pur-phy.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxj!houxm!ihnp4!inuxc!pur-ee!CS-Mordred!Pucc-H:pur-phy!act
From: act@pur-phy.UUCP (Alex C. Tselis)
Newsgroups: net.med
Subject: Distribution of Blood Groups
Message-ID: <1568@pur-phy.UUCP>
Date: Tue, 11-Dec-84 23:04:15 EST
Article-I.D.: pur-phy.1568
Posted: Tue Dec 11 23:04:15 1984
Date-Received: Thu, 13-Dec-84 05:30:07 EST
Distribution: net
Organization: Purdue Univ. Physics Dept., IN
Lines: 36

There have been some inquiries about the distribution of blood groups
among humans.  I have a reference which may be informative in this regard.
The reference is :   

	Daniel L. Hartl, HUMAN GENETICS, Harper & Row, New York (1983)

On pages 436-437 he gives maps which show the frequencies of the
 A      B
I  and I  alleles among the aboriginal populations of the world.  (The A
and B here are superscripts.)  The blood cell antigens are determined by
one locus on the ninth chromosome, and there are alleles of three types:
IA, IB and IO (I won't use superscripts any more; too tedious to type
them in.)  If a person's genotype is IA/IA or IA/IO, then their red blood
cells (RBCs) carry type A antigen,  if their genotype is IB/IB or IB/IO,
then their RBCs carry type B antigen.  If their genotype is IA/IB, then
their RBCs carry both type A and type B antigens.  Therefore, they have
type A, type B and type AB blood, respectively.
If the genotype is IO/IO, then their
RBCs do not carry either antigen, and their blood type is O.

Some of the statistics given in the book (this may repeat previous postings;
if so, sorry) are:

Among Caucasians:

			Type A       42%
			Type B        8%
			Type AB       1%
			Type O       48%

Among Chinese(there was nothing about other Asians):

			Type A       31%
			Type B       28%
			Type AB       7%
			Type O       34%