2006-10-21 21:18:19 · 23 answers · asked by Anonymous in Science & Mathematics ➔ Biology
Yes.
But that doesn't mean they will look or behave identically.
Aloha
2006-10-21 21:19:56 · answer #1 · answered by Anonymous · 1⤊ 1⤋
I hope this will be of help..
A search on "identical twins DNA" led us into a fascinating world of genetics, cloning, and the old nature vs nurture debate.
As we soon learned, identical twins, formed when one fertilized egg splits, are the only people in the world with identical DNA. Fraternal twins, on the other hand, are formed when two different eggs are fertilized. Genetically speaking, fraternal twins are no closer than normal siblings, sharing only about 50% of their genes.
Although identical twins have the same genotype, or DNA, they have different phenotypes, meaning that the same DNA is expressed in different ways.
Traits determined by phenotype, such as fingerprints and physical appearance, are the result of "the interaction of the individual¿s genes and the developmental environment in the uterus." Thus, a DNA test can't determine the difference between identical twins, while a simple fingerprint can.
2006-10-21 21:23:46 · answer #2 · answered by Go Wing's 3 · 1⤊ 1⤋
1.A search on "identical twins DNA" led us into a fascinating world of genetics, cloning, and the old nature vs nurture debate.
As we soon learned, identical twins, formed when one fertilized egg splits, are the only people in the world with identical DNA. Fraternal twins, on the other hand, are formed when two different eggs are fertilized. Genetically speaking, fraternal twins are no closer than normal siblings, sharing only about 50% of their genes.
Although identical twins have the same genotype, or DNA, they have different phenotypes, meaning that the same DNA is expressed in different ways.
Traits determined by phenotype, such as fingerprints and physical appearance, are the result of "the interaction of the individual¿s genes and the developmental environment in the uterus." Thus, a DNA test can't determine the difference between identical twins, while a simple fingerprint can.
2.Identical twins have identical DNA. They come from the same fertilized egg, which had only one complete set of DNA in the first place. That fertilized egg and its single set of DNA split to form twin embryos-each with its own set of DNA, identical to the other. One small quibble: the DNA sets will be identical, unless one fertilized egg's DNA mutates. Such mutations, however, are normally so tiny that DNA analysis can't detect them.
Suppose one identical twin commits a crime. How do you tell which twin did it if the DNA is identical? Well, you don't use DNA analysis since the DNA is the same. You dust for fingerprints. Genes only set the pattern for the fingerprint. The print develops in a placenta environment that differs somewhat for each twin. That, in turn, results in similar but different fingerprints.
2006-10-21 21:32:29 · answer #3 · answered by Anonymous · 0⤊ 1⤋
Although identical twins have the same genotype, or DNA, they have different phenotypes, meaning that the same DNA is expressed in different ways.
Traits determined by phenotype, such as fingerprints and physical appearance, are the result of "the interaction of the individual¿s genes and the developmental environment in the uterus." Thus, a DNA test can't determine the difference between identical twins, while a simple fingerprint can.
2006-10-21 21:28:29 · answer #4 · answered by Star 5 · 0⤊ 1⤋
Yes and no.
The DNA sequence will indeed be about the same, but they may differ in their genomic imprinting. You can think of genomic imprinting as modifications to DNA that don't actually change the DNA sequence, but alter gene expression. This is one reason why identical twins don't always look identical.
Differences in genomic imprinting can have some very notable effects, but most of the time identical twins are in fact pretty close to identical.
2006-10-21 21:26:47 · answer #5 · answered by Geoffrey B 4 · 0⤊ 1⤋
Yes, identical twins have the same DNA, but they don't have the same fingerprint. Every person has an unique finger print.
2006-10-21 23:02:48 · answer #6 · answered by jasmina m 1 · 0⤊ 1⤋
Not necessarilly all part of the DNA. only a portion of which contains a representation of the other twin's DNA. so in case a twin needs a transplant the next of kin who is the other twin can donate for him so that no organ rejection will occur after the transplant.
2006-10-21 21:31:05 · answer #7 · answered by gizmo_crackhead 2 · 0⤊ 1⤋
No two people can have same DNA at all.
And about identical twins they can have similar DNA , but about exact maching DNA ,, its impossible
2006-10-22 18:08:34 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Yes, they both came from the same egg and sperm cells that fused then split in half while still a mass of cells to develop into 2 separate babies. The only way it could be different is if through the effects of mutagens such as UV light one of them got DNA damage later in life and the other didn't.
2006-10-21 21:20:58 · answer #9 · answered by Em_butterfly 5 · 0⤊ 1⤋
dna sequence is one person's identity and it is said that even identical twins don't have identical dna sequence
2006-10-22 18:53:17 · answer #10 · answered by K R 2 · 0⤊ 0⤋
Yes. Identical twins are actually one zygote that splits and becomes 2.
2006-10-21 21:21:00 · answer #11 · answered by Someday Soon 2 · 0⤊ 1⤋