2007-03-02 06:54:01 · 12 answers · asked by kataragon 1 in Science & Mathematics ➔ Biology
The DNA that is given to them by their parents is the same and there is a high percent chance they could have identical nuclear DNA but what they end up with may be different as as result of random mutation and chiasmata "cross over"
Also they would have same mitochondria DNA because of same mother but Mitochondrial DNA is highly mutated more than nuclear DNA
The expression of the genes due to environmental exposure that may be different can be slightly different
2007-03-02 07:52:55 · answer #1 · answered by Anonymous · 1⤊ 0⤋
According to Wikipedia:
"Identical twins have identical DNA but differing environmental influences throughout their lives affect which genes are switched on or off. This is called epigenetic modification. A study of 80 pairs of human twins ranging in age from 3 to 74 showed that the youngest twins have relatively few epigenetic differences. The number of epigenetic differences between identical twins increases with age. 50-year-old twins had over three times the epigenetic difference of 3-year-old twins. Twins who had spent their lives apart (such as those adopted by two different sets of parents at birth) had the greatest difference. [4]. However, certain characteristics become more alike as twins age, such as IQ and personality"
Hope this helps
2007-03-02 07:06:29 · answer #2 · answered by Anonymous Q 2 · 1⤊ 1⤋
No. They each have their own DNA. There DNA is very similiar though, just not identical. Differences are present due to small non harmful mutations that do occur in all living things rarely and randomly. Differences caused by a small mutation in one ID are highly unlikely to be found in the other because its a random occurance. Genetic Testing can distinguish bigger differences in DNA between two people but is not likely to tell the difference between ID twins.
2007-03-02 07:21:57 · answer #3 · answered by BP 7 · 0⤊ 2⤋
DNA has no longer something to do with fingerprints, different than genetic ones. I even have comparable twin nieces. My Dad is an comparable twin. the two my Dad and Uncle have the comparable DNA. My nieces have the comparable DNA. Fingerprints, in spite of the incontrovertible fact that, are like snowflakes. No 2 are the comparable. EVER! there is now slightly prognosis into the prints of our ears. it variety of feels that they, too, are unique. yet another section it fairly is being appeared into is the iris of the attention. possibly we are extra "fearfully and fantastically made" than we ever imagined.
2016-10-02 06:48:35 · answer #4 · answered by ? 4 · 0⤊ 0⤋
Yes. The twins will have the same DNA because instead of the cells multiplying first in the womb, the cells in the egg divide then multiply, making two identical fetuses
2007-03-02 07:43:49 · answer #5 · answered by Anonymous · 0⤊ 1⤋
I believe they do in some cases. I saw an episode on The Maury Show where a set of brothers had both had sex with a young woman and the exact father of a child could not be determined because they both had the same DNA.
2007-03-02 07:04:25 · answer #6 · answered by somepurpose 2 · 0⤊ 1⤋
They begin identical because the DNA starts both of them. Because they split, there are variations that effect them differently. so there are very subtle differences in their DNA, which makes the twins slightly different.
2007-03-02 07:08:56 · answer #7 · answered by Anonymous · 0⤊ 1⤋
They do not share the same DNA. Though what they do have in similar are the genetic facial/physical structures in a couple chromosomes. Different finger prints too.
2007-03-02 06:59:24 · answer #8 · answered by thehazmat 2 · 0⤊ 1⤋
Identical.. theoretically.
2007-03-02 06:57:54 · answer #9 · answered by Anonymous · 0⤊ 1⤋
http://ask.yahoo.com/20010213.html
genetically the same but they can have emotional differences, different life spans, sexual orientation etc
2007-03-04 13:48:23 · answer #10 · answered by flkasdjflkasdj;lrf 3 · 0⤊ 0⤋