what are the most common blood types in america and other countries? and least common?
2006-12-27 17:35:23 · 10 answers · asked by Devin N 1 in Science & Mathematics ➔ Medicine
In the US, Type O positive is the most common and type AB negative is the least common. Someone else posted a wildly incorrect ration for Rh postive and negative as 50:50, but in reality it is about 85% postive and 15% negative in the US. In other countries, since ratios for types A, O, B, and AB are different in different ethnic groups, the overall ratios are different.
For the US, the rough breakdown is:
O 45% O+ 38.25% O- 6.75%
A 40% A+ 34% A- 6%
B 10% B+ 8.5% B- 1.5%
AB 5% AB+ 4.25% AB- 0.75%
Arranged from most common to least common, this would be:
O+, A+, B+, O-, A-, AB+, B-, AB-
By the way, to be Rh negative, both of your parents must be negative as it is recessive, and they cannot produce an Rh positive child. But two Rh positive parents can produce a positive or negative child if they both carry a recessive Rh negative gene.
2006-12-27 17:55:24 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Blood types A positive and O positive are virtually equally as common and are teh most common blood types. In general, negative blood types are far less common than their positive counterparts with AB negative being the least common. This is world wide, not restricted to any single country or region.
2006-12-30 19:48:51 · answer #2 · answered by tom5551 3 · 1⤊ 0⤋
The most common blood type in the US is A+ and O+ (about 40% each) and this trend continues in most of the western nations. Many Asian nations have mostly A+ and B+ and thus there are also a lot of AB+. Rh positive is generally more commonly seen than Rh negative all over the world.
2006-12-27 17:55:37 · answer #3 · answered by dally1025 3 · 1⤊ 2⤋
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Blood Type O Its kinda the opposite. I can have insensitive/ruthless/vain tendencies but it isn't a constant trait. Passionate yes, obsessive yes. Outgoing no. Warrior I can see, natural instincts are right at the surface.
2016-04-05 05:07:29 · answer #4 · answered by Anonymous · 0⤊ 1⤋
Common blood types are
A negative
A positive
B negative
B positive
O negative
O positive
Rarer is AB negative, AB positive
2006-12-27 17:42:31 · answer #5 · answered by LiverGirl98 7 · 1⤊ 2⤋
I think the most common is type O+. The least common is AB.
2006-12-27 17:39:29 · answer #6 · answered by Arnoux 4 · 1⤊ 1⤋
Blood types are based on genetics, not on where you are living. The possiblities of your blood type are A, B, AB, or O. O is the recessive gene, so blood type O is probably the least common of the four. and blood type A, B, and AB are dominant, so they should be more common.
2006-12-27 17:41:06 · answer #7 · answered by =] 2 · 1⤊ 6⤋
Great point, I'm interested to know more too
2016-08-08 22:34:51 · answer #8 · answered by Eartha 3 · 0⤊ 0⤋
40% have O and 40% have A. The Rh factors (+/-) are about 50/50.
2006-12-27 17:42:34 · answer #9 · answered by freshbliss 6 · 0⤊ 7⤋
O+...
2006-12-27 17:55:52 · answer #10 · answered by ABBYsMom 7 · 2⤊ 0⤋