The Blood Group problem!!!!
Andrew T. Austin
slightlynervous at NOSPAMbtinternet.com
Mon Jan 15 14:23:24 EST 2001
So, if i may translate it goes a bit like this (i might be wrong, it has happened before):
Parent with blood type `A` (really is `AO`) breeds with parent `B` (`BO`) they can produce a child with groups `A` (`AO`) or `B` (`BO`) or `O` (`OO`).
Parents with blood groups `A` (`AO`) and `O` (`OO`) can produce only child with groups `A` (`AO`) or `O` (`OO`).
Parents with groups `B` (`BO`) and `O` (`OO`) can only produce a child with either `B` (`BO`) or `O` (`BO`).
Parents with groups `AB` and `AB` will produce either a child with `A` (`AA`) or `B` (`BB`) or `AB`.
Parents with groups `O` (`OO`) and `O` (`OO`) will only produce a child with groups `O` (`OO`)
Parents with groups `AB` and `A` (AO) will produce........
And so on.
Andrew "tries to remember biology class" Austin.
"Richard L. Hall" wrote:
> Good Morning,
> Wrong! Everybody has the "O-gene."
> Genes are expressed as polypeptides or proteins. The A and B antigens are NOT proteins but rather glycolipids found on the membranes of most human cells. The proteins produced by "A and B genes" are enzymes that catalyze the addition of specific sugars (either N-acetylgalactosamine or D-galactose) to a glycolipid consisting of L-fucose: D-galactose: N-acetylglucosamine: D-galactose: N-acetylgalactosamine:lipid. The five sugar glycolipid is sometimes called the 'H-antigen" although it is actually non-antigenic. The A or B antigens are formed by the addition of either N-acetylgalactosamine or D-galactose to the H-antigen.
> The so called "O gene" produces the glycosylating enzyme (or enzymes) producing the "H-antigen." There are "A-genes, B-genes, and "O genes" as well as an A-antigen, a B-antigen, and a "H-antigen" and they are apparently inherited in a Mendelian fashion.
> In human blood groups the AB blood type has a gene for type A blood inherited
> from one parent and a gene B inherited by the other parent, so you see there
> are no O genes in blood group AB therefore a baby with blood type O can not
> Richard L. Hall, Ph.D.
> Comparative Animal Physiologist
> University of the Virgin Islands
> 2 John Brewers Bay
> St. Thomas, U.S.V.I. 00802
> 340-693-1385 FAX
> rhall at uvi.edu
> "Live life on the edge...the view is always better" rlh
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