Blood type????!
Question: okay if im B positive and my sis is b positive doesn't that mean one of my parents have to be B positive?
Answers: okay if im B positive and my sis is b positive doesn't that mean one of my parents have to be B positive?
NOT NECESSARILY!! I dont know if you are a science student or not but if you are not it ill be difficult for you to understand. Still ill try to explain.
Blood group antigens have a unique property that group AB is made up of A and B. Group O has no antigens. Whereas groups A has only A antigen and B has only B antigen. (group you ill have depends on type of genes you inherit from each parent. Now the group (a,b,ab or o) depends on set of two genes which you get one from each parent. Its like this
@group AB - GENE A AND GENE B
@group A - GENE A AND either GENE A OR GENE O
@group B - GENE B AND either GENE B OR GENE O
@group O - GENE O AND GENE 0 ie neither A nor B
(i hope you are getting it)
now if you write it down on paper (with blood groups of your mom and dad and see for possible combinations you will get it)
so like both you and your sister are B + its possible either both your parents are AB OR one is B and other is AB { SIMILARLY ITS DONE FOR +/- called as rhesus factor but i think it ill make it more complicated so i wont explain it) i hope i was able to at least give you an idea. For your information i am giving the possible combinations that your parents may have
*AB+ AND B+
*AB+ AND B-
*AB+ AND A+
*AB+ AND A-
*AB+ AND O+
*AB+ AND O-
*B+ AND O+
*B+ AND O-
{EITHER OF YOU PARENT MAY HAVE THESE COMBINATIONS + AND - MAY BE INTERCHANGED}
THE COMBINATION WHICH THEY CANT HAVE IS
O+/- AND O+-
AB+/- AND AB+/-
A+/- AND A+/-
I know its a bit complicated but then you asked for it if you dont get it you may mail me.
yes it does
yeah at least one since u have to inherit that trait from one of them
yes it does. I'm b- (neg).
Kinda yes, kinda no.
Basically, the B and + genes are carried separately from each other. One of your parents has to have the B gene, and one of your parents has to have the + gene, but it doesn't have to be the same parent.
One parent has to be "B" or "AB", but could be + or -. The other parent could be "A", "B", "AB", or "O", but has to have the + gene. Also, one parent could be anything at all, but the other parent could be B+ or AB+. Any of these possibilities will work!
There's also some more rare, random gene types that mean that your parents do have the B or the + genes, but it doesn't show up for them.
There's another chance, too. Genes do get mixed around some when sperm and eggs are made. This doesn't change the parent's genes, but it does mean that the children can end up with different types of genes than the parents have. This is kind of unlikely to happen to two kids in a row in the same way, but it isn't impossible.