2007-01-28 10:36:31 · 8 answers · asked by fltcmar 1 in Science & Mathematics ➔ Biology
cos they are identical ^_^ same blood type, dna wtever
i think :)
2007-01-28 10:39:30 · answer #1 · answered by YAHOO! Answers 4 · 1⤊ 1⤋
First off, blood type is NOT why identical twins are ideal for organ transplantation. Why monozygotic or identical twins are ideal has to do with them having practically the same HLA locus, otherwise known as the major histocompatibility (MHC) locus (the minor one is important too but not to the same extent). The reason for this is that within these loci is encoded what we see as self and non-self or foreign. Our immune cells will recognize the twins cells as self because they express the same MHC alleles on their surface. Throughout development our immune cells were "trained" to discriminate cells based on the presence of specific MHC alleles that we had in our genome and also the proteins our cells make in our body. Organ rejection occurs because our immune system views any organ with MHC alleles we don't have or are different as foreign and bad and worth killing. It is worth noting that siblings in general are your best shot for a match because we inherit our MHC loci from both mother and father, and it is possible that siblings can get almost the same exact chromosomes (save for recombination events) even considering that parents have two different sets of chromosomes to give. Still rejection occurs between identical twins because they never harbor the exact same HLA locus, recombination and random mutation are to blame for this.
2007-01-29 02:43:29 · answer #2 · answered by rgomezam 3 · 0⤊ 0⤋
Because barring mutations and other changes there DNA is possibly identical, and they are the least likely organs to be rejected. You see when someone gets and organ transplant they must take rejection drugs because the organs cells are essentially different. The nuclear DNA is different in all non-twins and mitochondrial DNA is different if they have different mothers so when the DNA is different, the proteins that are produced are different at a cellular level. So the other cells in the body view these cells in the new organ as intruders such as a pathogenic virus or bacterial infection.
2007-01-28 18:48:00 · answer #3 · answered by Anonymous · 0⤊ 1⤋
Because their DNA is the same, the antibodies that are in their tissues should be the same, so the immune system won't attack the transplanted organ. This means that one's body will not recognize tissue from the twin as foreign, but will treat it as its own.
2007-01-28 18:48:58 · answer #4 · answered by callthedog 2 · 0⤊ 0⤋
being identical they will be a perfect tissue match. This means the organ has the least likely chance of being rejected by the recipiants body.
2007-01-28 18:40:11 · answer #5 · answered by mutvulture 3 · 1⤊ 1⤋
Because they are identical...same blood type, same DNA, it would be really hard to get a better match than that!
2007-01-28 19:57:36 · answer #6 · answered by Raine 4 · 0⤊ 0⤋
they are from a split single egg, so share identical beginnings. the cells from one will be accepted by the other.
2007-01-28 18:57:54 · answer #7 · answered by SAINT G 5 · 0⤊ 0⤋
blood types would be compatible
2007-01-28 18:40:09 · answer #8 · answered by twysty 5 · 0⤊ 1⤋