What determines your blood type?

Question

My mother's blood is AB - and my father's blood was O +, I have A +, is that possible? Now both my kids are A+ and their father is O -, is that possible?

Answer 1

Your genotype determines your blood type before your born. There are three alleles or versions of the blood type gene: A, B, and O. Since everybody has two copies of these genes, there are six possible combinations; AA, BB, OO, AB, AO, and BO. In addition to the proteins (agglutinogens) existing on your red blood cells, other genes make proteins called agglutinins (a-GLOO-tin-ins) that circulate in your blood plasma. Agglutinins are responsible for ensuring that only the blood cells of your blood type exist in your body. People who have an AA genotype are said to have type A blood because the agglutinogen on their red blood cells has the enzyme activity associated with the A allele. It is important to recognize that people with the AO genotype also have the enzyme activity associated with the A allele, so they are also said to have type A blood. People with the BB and the BO genotypes are said to have type B blood. People who have the AB genotype have the enzyme activity associated with both the A and B alleles. These people have no agglutinins in their blood plasma. In the case of blood type, both the AA and AO genotypes cause individuals to display the A blood type phenotype. Similarly, both the BB and BO genotypes cause individuals to display the B blood type phenotype. Individuals who are phenotypically type O or type AB have only one possible genotype, OO and AB, respectively. In different parts of the world, the fraction of individuals with blood type A, B, O, or AB differs. The frequency with which blood types are observed is determined by the frequency with which the three alleles of the ABO gene are found in different parts of the world (allele frequency). Variation in the allele frequency at the ABO gene reflects the social tendency of populations to marry and reproduce within a national, regional, or ethnic group. As people throughout the world intermingle to a greater extent, the distribution of the different blood types will become more uniform throughout the world. Hopefully that helps a bit!

Answer 2

What Determines Your Blood Type

Answer 3

I can't tell you too much about being positive vs. negative, but I do know that type O is recessive to A and B, which means, if you have 1 A gene and 1 O gene, your blood type will be A. This is probably the case with you because you recieved one A gene from your mom, and an O gene from your dad (Your mom had 1 A and 1 B gene, your dad had 2 O genes). You're kids could only be A or O since they can only get an O gene from your husband and an A or an O gene from you. Since they are both A, they clearly recieved A genes.

I did a little more research, and a negative blood type is recessive to positive, so it makes perfect sense that you and your kids are all positive.

Answer 4

Yes it is possible. The positive and negative are if you have the Rh antigen or not. For example, a person with blood type A- cannot get blood that is positive. However, a person who is positive for the Rh antigen can get blood from positive or negative blood donors. Rh is not passed down from parents. With your parents having AB and O, you can only have type A or type B blood because O is recessive. You could have type O if your mother was AO or BO, but she isn't. Since you have type A, your blood is AO (A from your mother and O from your father... but A is dominant). With the children's father being type O, your children could either be A (A from you, O from him) or O (the recessive O from you and an O from him).
I hope that helps.

Answer 5

Blood type is determined by surface antigens on ur red blood cells.if a person has A blood group that means he/she has antigen A.so,ur mum has AB blood group and that means she has both A and B antigens.Ur husband got O Blood type means he has neither anti. A nor anti. B.In genetic,blood type is shown base on the dorminant of A an B allels.tat means if a person is A type,then he/she has either AA/AO but an O type fellow will only has OO.if u r AA,all your kids will surely hv A type of blood.but if u hv AO,ur kids hv 50%/50% for AO and OO respectively.In a nut shell,ur kids can only hv either type A or type O blood group.In the same case,ur siblings can only hv A or B blood type...

Answer 6

This Site Might Help You.

RE:
What determines your blood type?
My mother's blood is AB - and my father's blood was O +, I have A +, is that possible? Now both my kids are A+ and their father is O -, is that possible?

Answer 7

Lets explore the possibilties given that A and B are codominant to type O and that rh+ is dominant to rh-. Also remember that you get a gene from mom and one from dad.

A= type A B=type B i=type O R=rh+ r=rh-

your mother's genotype is ABrr, your father is iiR (he has two rh genes but we will never know what the other one is unless he has an rh- child.)

your genotype is AiR (once again two rh genes but I can't tell you what the second one is from the information given.) Since you could have gotten one of each of the allelles from a parent it is possible.

For your kids given that you are AiR and your husband is iiR it is possible for your children to be type O or type A. It is also possible for them to be positive. So, yes it is possible.

Answer 8

As mentioned, yes, it is possible because of the dominant/recessive factors. If you want to learn more about it, try this link:

http://www.biology.arizona.edu/human_bio/problem_sets/blood_types/markers.html

Answer 9

I am your father

Answer 10

I thought I remembered my lecturer said it wasnt possible