Is the DNA of idetical twins exactly the same?
2007-07-05 10:57:12 · 4 answers · asked by johnandeileen2000 7 in Science & Mathematics ➔ Biology
Its true that ordinary testing will find that twin DNA will be identical. However, nobody looks at whole genomes. The fact is despite similar genetic make-up identical twins like everyone else accumulate mutations with age. There are less ordinary methods that can be used to locate these differences.
2007-07-05 12:34:11 · answer #1 · answered by Anonymous · 1⤊ 0⤋
No their DNA is not EXACTLY the same. Mutations occur over time as their DNA replicates which are totally random. For the most part these mutations have no effect on phenotype which is why twins are so similar, but there is the possibility that one will develop a genetic disease while the other reamains normal.
As far as forensics goes telling twins apart by their DNA is almost impossible though.
2007-07-05 18:14:00 · answer #2 · answered by Herschel Krustofski 2 · 1⤊ 0⤋
Yes, since they come from the same embryo that originally had one type of dna.
2007-07-05 17:59:55 · answer #3 · answered by Me 2 · 0⤊ 0⤋
Yes it is. They were one embryo (so one set of DNA) which split into two, each with identical DNA.
2007-07-05 18:02:11 · answer #4 · answered by Barb Outhere 7 · 0⤊ 0⤋