Is it possible for 3 sisters to have 3 different blood types? All from the same biological parents? The blood types are A+, O+ and O-.
2006-07-05 15:45:16 · 4 answers · asked by Jade 5 in Health ➔ Other - Health
yes
2006-07-05 15:49:38 · answer #1 · answered by Blunt Honesty 7 · 0⤊ 0⤋
The situation with human blood genetics is far more complex, since at each point there are multiple possible characteristics. Nevertheless, the genetics of human blood is far better understood than that of any other human tissue.
First, let's look at the *** blood types. Each person receives an A, B, or O gene from each parent. In this system, the A and B genes are co-dominant and the O gene is recessive. Thus, a person whose genetic type is either AA or AO will have blood type A, those with genetic type BB or BO will have blood type B, and only those genetic type OO will have blood type O. This means that a child with type O blood could have parents with type A, type B, or type O blood (but not with type AB). Conversely, if two parents both have type O blood, all their children will have type O blood.
As it turns out, there are more than a dozen complete blood group systems other than the *** system and the Rh system. This makes great precision possible in looking at inheritance and family trees.
There is no reason, based on your blood type, to suspect that your parents might not really be your parents. If questions linger for other reasons, specific tests are available through blood banks that can settle the issue. Given the billions of unique people on this planet, the power and precision of genetic testing are amazing.
if you have doubts about your parents get dna tested.and it would helped alot if you knowed your parents blood type.
2006-07-05 23:53:15 · answer #2 · answered by purple 6 · 0⤊ 0⤋
Yes. One of your parents has type A blood and the other has type O. Your mom is RH + and your dad is RH -, probably.
2006-07-05 22:49:32 · answer #3 · answered by The Apple Chick 7 · 0⤊ 0⤋
Yes but only if ALL these conditions are fulfilled:
1.-Both parents carry a Rh- gene (Rh - is recessive, so two copies are needed. They may be Rh + if they have only one copy)
2.-Some parent is O
3.-The other parent is A or AB.
2006-07-05 22:53:40 · answer #4 · answered by mbestevez 7 · 0⤊ 0⤋