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If a person is blood type A then they will have red blood cell antigens of A and plasma antibodies (agglutinins) called Anti-B. If a person is Type B then they will have B antigens and Anti-A antibodies. If a person is Type AB they will have both A and B antigens, but no plasma antibodies. If a person is type O then they will have no red blood cell antigens but they will have both anti-A and anti-B plasma antibodies.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoSHORT VERSION: Marker molecules on red blood cells
LONG VERSION:Blood types are determined by two acquired genes, one from each of your parents.
Your "blood type," generally spoken is your blood phenotype, that is the physical expression of your genes. Blood type has three genetic variations, or alleles - A, B, and O.
A and B are dominant alleles, and O is recessive. That is, A and B will physically be expressed over O. Therefore, the only way you can obtain a blood type O is by having two O alleles. Because A and B are both considered "dominant," A and B can both be expressed together, as neither take dominance over the other. This results in a blood type AB.
-----------------------------------------------------------------------------------------------As Dankrescent said above that determines it. But what blood types are are chemicals. Everyone has that generic Red Blood Cell, it's just that, based on what's in your DNA, it has a chemical on it. Each chemical has been given a name. There's the chemical represented as 'A', another by 'B', and then there's 'O'. Those three are the primary blood chemicals. Then there is a fourth chemical that you either have or don't have. If you have it, it's represented with a plus (called positive).
For example: AB Positive (AB+) O Negative (O-). These blood types react differently with each other. Some are compatible and some aren't. You'll learn all about this in Life Science and Biology.
Wiki User
∙ 13y agoA person's blood type is determined by genetics, just like most everything else.
Wiki User
∙ 13y agoEither 'parents' -but it's not a straightforward link. Or 'bonemarrow'.
Wiki User
∙ 13y agoaids
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What country has highest AB positive blood type in the world?
I dont know the answer but I am trying to find out if anyone out there that has AB blood has any ties to Scythian ancestors...thanks, Susan
How does type 0 blood differ from A, B and AB blood types?
Your blood type is determined by what type of antigen you have in your body. Each person has different antigen's or lack there of in the blood. A blood test is used to determine what these are.
What example describes an inherited trait that cannot be determined by observing an individual?
blood type -_-
How is one's blood type determined?
An individual's blood type is genetically determined. This means that the type of blood you have comes from your mother or father. If your parents have different blood types, you would inherit the more dominant type. However, types A and B are considered co-dominate. Therefore, if one of your parents is Type A and the other is Type B, it is likely that you would have Type AB blood.
A persons blood type depends on the presence or absence of certain proteins called?
A & B antigens on the surface of the read blood cells
Does the size of red blood cells have anything to do with determining a persons blood type?
The size of blood cells is not a factor in determining a person's blood type. Blood type is determined by a combination of certain proteins in the cells.
How can a child's blood be o positive?
A persons blood type is determined by their genes. For a child to have O positive blood, it will not have any A or B markers but will contain an Rh factor. Both parents would be O positive.
A person blood type is determined by?
A person's blood type is determined by genetics, just like most everything else.
What determines a persons blood type-?
Genotype, complete dominace A, complete dominance with positive RH factor A+, co dominant AB
Is blood type related to personality?
No, your personality has nothing to do with blood type. Your blood type is known before you are ever born and ever have a chance to show your personality. Your blood type is determined by your parents.
Blood type in humans is controlled by which alleles?
Human blood type is determined by codominant alleles.
Can blood type determined by using other body fluids besides blood?
no, only blood can be used to determine blood type.
Are there many persons with O type blood?
a lot
What does the marker molecules on red blood cells determine a persons?
Blood type
If a person with Type 0-plus blood needs a blood transfusion can A-plus blood be given?
No. Persons with type O blood can only receive type O blood.
Why do some guys have big butts?
A persons body shape and type is determined by genetics.
Why are you able to give O blood to anyone?
A person with type o blood is a universal donor and can donate blood to persons of any blood type.
