Blood Type Problem please help?!
Question: Blood Type Problem please help!?
Both of my parents are A+!. I have had blood tests done since I was a baby and the tests have always shown that I am also A+!. Recently, I donated blood and it was tested and came out A- !. Either someone made a mistake or my blood type changed!? Is it even possible for me to be A- if both of my parents are A+!? Can RH Factor change!? thanks in advanceWww@Answer-Health@Com
Answers:
To start with, it's definitely possible that you are A- with two A+ parents!. Both parents can be carriers of the Rh- gene!. Here is how the genetics works:
Everyone has two copies of the Rh gene!. + is dominant over -, so someone who is ++ or +- shows up as + on a blood type!. You are only - if you are also -- genetically!. Each parent gives one copy of their genes to the child!. In this case, you've got mom (blood type +) (gene type +-) and dad (blood type +) (gene type +-)!. It's completely random which gets passed on, and here are the possible mixes that can happen:
+ (mom) + (dad): ++ genes, + type!.
+ (mom) - (dad): +- genes, + type!.
- (mom) + (dad): +- genes, + type!.
- (mom) - (dad): -- genes, - type!.
Now, onto the "change" in your Rhesus factor:
It didn't change!. Your genes won't randomly change throughout your life like this!.
It's possible that you are mistaken about your early blood type!. You've said that "tests have always shown" that you are +!. Is this based on your parent's memory of blood type from when you were a baby, or actual tests!? It's also a common myth that baby's will receive exactly their father's (or exactly their mother's) blood type, so they may have just assumed you match one of them!. Even if they don't believe in that myth, it's possible that they don't know much about the actual genetics, but assume that you would have to match one of them exactly, and since they are both the same, you must have A+!. This is another common myth--that blood type always matches one of the parents, as opposed to being a mix of the genes!.
Other explanations:
1!. It's possible that you are C/E Rh+ and D Rh-!. There are 3 different Rhesus factors: Rh(C), Rh(D), and Rh(E)!. C and E don't typically cause a reaction when transfusing blood, but D almost always will!. Historically, someone was described as Rh+ if they were positive for C, D, or E!. Now, people are only described as Rh+ if they are positive for D!. C and E don't matter!.
2!. It's possible that you are Rh(Du)!. This is positive for Rh(D), but at very, very low levels!. This means that it could be missed in a blood type, and have you show up as negative!. This is also commonly referred to as "weak D"!. There is a chance that you might have a reaction if exposed to Rh(D)+ blood, so if this is discovered, you'd probably be labeled as Rh(D)- for receiving transfusions, but Rh(D)+ for giving transfusions!.
3!. You had a bone marrow transplant from someone who is Rh-!. I'd think you'd already know if this were the case, and yes, it does involve an actual change in blood type!.Www@Answer-Health@Com
Everyone has two copies of the Rh gene!. + is dominant over -, so someone who is ++ or +- shows up as + on a blood type!. You are only - if you are also -- genetically!. Each parent gives one copy of their genes to the child!. In this case, you've got mom (blood type +) (gene type +-) and dad (blood type +) (gene type +-)!. It's completely random which gets passed on, and here are the possible mixes that can happen:
+ (mom) + (dad): ++ genes, + type!.
+ (mom) - (dad): +- genes, + type!.
- (mom) + (dad): +- genes, + type!.
- (mom) - (dad): -- genes, - type!.
Now, onto the "change" in your Rhesus factor:
It didn't change!. Your genes won't randomly change throughout your life like this!.
It's possible that you are mistaken about your early blood type!. You've said that "tests have always shown" that you are +!. Is this based on your parent's memory of blood type from when you were a baby, or actual tests!? It's also a common myth that baby's will receive exactly their father's (or exactly their mother's) blood type, so they may have just assumed you match one of them!. Even if they don't believe in that myth, it's possible that they don't know much about the actual genetics, but assume that you would have to match one of them exactly, and since they are both the same, you must have A+!. This is another common myth--that blood type always matches one of the parents, as opposed to being a mix of the genes!.
Other explanations:
1!. It's possible that you are C/E Rh+ and D Rh-!. There are 3 different Rhesus factors: Rh(C), Rh(D), and Rh(E)!. C and E don't typically cause a reaction when transfusing blood, but D almost always will!. Historically, someone was described as Rh+ if they were positive for C, D, or E!. Now, people are only described as Rh+ if they are positive for D!. C and E don't matter!.
2!. It's possible that you are Rh(Du)!. This is positive for Rh(D), but at very, very low levels!. This means that it could be missed in a blood type, and have you show up as negative!. This is also commonly referred to as "weak D"!. There is a chance that you might have a reaction if exposed to Rh(D)+ blood, so if this is discovered, you'd probably be labeled as Rh(D)- for receiving transfusions, but Rh(D)+ for giving transfusions!.
3!. You had a bone marrow transplant from someone who is Rh-!. I'd think you'd already know if this were the case, and yes, it does involve an actual change in blood type!.Www@Answer-Health@Com