does DNA change with a blood transfusion?

Not permanently. If soneone took a blood sample immediately after you got your transfusion (and, let's say it was a massive transfusion, with most of your blood being replaced) and did a DNA test on the blood that was taken from you (which used to be someone else's), it could show someone else's DNA.

However, having said that, I also want to say that from what I understand of DNA tests, they are the results of the DNA from many, many cells. Your sequence and the sequence of the other person would show up. There would probably be enough ambiguity so that they would have to repeat the test again later (by which time your body would have replaced a lot of the blood cells, as they only live a relatively short time) and this time your own DNA would predominate.

Now, aside from blood transfusons or transplants or skin grafts, it IS possible for a single person to have two different kinds of DNA, strange as it may seem! It has recently been discovered by repeatedly testing inmates' DNA that some people have one kind of DNA in one part of their body, and a different kind in another part.

The cause of this is that sometimes a woman is pregnant with twins and one of the embryos begins to absorb the other. This can cause conjoined twins, just as when an embro begins to divide into two and does not quite finish. It can also cause another problem. Sometimes one almost half absorbs the other, with what was (say) the left side of one twin and the right side of the other twin becoming one body. Thus, one part of the body will have one DNA and the rest of the body will have a related (but different) type.

This might not cause immediate problems, but you can see how a person might have strange inner conflicts. This is especially true in cases where the fraternal twins were a boy and a girl. What if a person had a part of the body that was male and a part that was female...? They need not be the sexual parts of the body, but you can easily see how such a person could have sexual desires that did not correspond to their bodily parts.

Someday there will be prenatal testing and treatments to prevent this happening, so that persons do not have to go through that confusion later on in life. That will be much simpler than changing everything else to suit them. After all, we can't make separate laws and unlimited accomodations for each type of birth defect.

No, it would not replace your 'unique DNA' ... even with the very incontrovertible certainty that it fairly is an fantastically 'sturdy question' because it means that you're 'questioning' about 'each and every of the stuff DNA can let us know about ourselves' and are questioning if it might want to 'replace it' ... yet only, 'blood', even as it truly is a sturdy aspect to attempt for 'DNA' is only a 'trouble-free liquid' and the really 'minute' volume you may want to get from a 'blood transfusion' (about one pint ... no matter if you get more effective than one pint in the course of the transfusion, each and every separate pint possibly comes from a special donor than any others) and your own DNA is in 'a lot more effective' than only your blood. i won't be able to inform you WHY an fantastically jiffy after the transfusion all of your blood might want to have a similar DNA that you've been 'born with' ... yet i comprehend that it does.

No, you can never change your DNA, it is the ultimate "fingerprint." Your DNA is in every cell of your body, not just your blood. Even your blood type won't change with a transfusion because you must have the same type of blood transfused into you that you already have (or type O negative which will assimilate with your own blood anyway).

No DNA does not change with a transfusion. Your DNA never really changes except in cases of mutation due to radiation or chemicals that cause cancer. The cancer cells have defective DNA.

Of course not. Blood transfusions are like substitute blood. Eventually, your bone marrow, which produces blood, will replace it. And it's DNA is the same as ever.

the original DNA in the blood is unaffected but the blood that comes in already has a different DNA (RNA)

Nope

NO NO NO NO, don't even think that, you have one set of DNA forever.

gosh no... if your DNA start to change, that would be big sh*t. you'd be mutated.

no way.