There are different types of blood, such as B+, B-, AB+, etc.
What is the difference between these types of blood? What makes one person's blood B+ and another person's B-?
2007-05-30 15:02:28 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Biology
Blood types differ on many bases. The basic bases for blood types are the presence of agglutinins and agglutinogens. Type A blood has A agglutinins and B agglutinogens, meaning they agglutinate blood with B agglutinins (this being the reason that you can not transfuse type B blood into type A blood). Type B blood is vice versa. Type AB blood, on the other hand, can receive all types of blood since it has both A and B agglutinins, and possesses no agglutinogens to destroy either agglutinin. Type O blood, can donate to any blood type, since it has no agglutinins present; although, type O blood can only receive type O blood because it has both A and B agglutinogens to agglutinate all other blood types.
The (+) or (-) you were talking about, is another consideration. It depends upon the Rh factor (Rhesus factor). The Rh factor is determined upon the presence or absence of the C and/or D agglutinin and/or agglutinogen. These attributes were passed on from the Rhesus monkey.
I hope I helped you in some way.
2007-05-30 18:26:14 · answer #1 · answered by Anonymous · 0⤊ 0⤋
There are dozens of different types. The most common ones are based on whether samples of the blood will clot each other. A will clot B, O won't clot others, AB will clot with everything not AB. In testing, the serum that cause this, but it is actually possible to match blood by drawing small samples and mixing them.
- and + normally refer to Rh positive and Rh negative where Rh is Rhesus (as in monkey) It is important because a mother can have a different Rh than her baby (because of the father's contribution) which can kill her next baby.
2007-05-30 22:09:43 · answer #2 · answered by Mike1942f 7 · 0⤊ 0⤋
the difference between type "a" and "b" blood is that "a" has b-antigens carried on the red blood cells, and "b" has a-antigens on the red blood cells. the positive and negative part refers to the presence of the Rhd antigen.
2007-05-30 22:09:54 · answer #3 · answered by Liz D 2 · 0⤊ 0⤋
Genetics of the blood types:
https://www.youtube.com/watch?v=9pnrpkQmNn0
2013-11-21 15:22:40 · answer #4 · answered by Anonymous · 0⤊ 0⤋
The + and - refers to the RH factor, if it is present (+) or not(-).
2007-05-30 22:05:20 · answer #5 · answered by minalerie 4 · 0⤊ 0⤋
This web site tells it all
http://en.wikipedia.org/wiki/Blood_types
2007-05-30 22:06:44 · answer #6 · answered by Jimmie 4 · 0⤊ 0⤋