there are billions and billions of people in the world.
As the saying goes: "In China, even if you are one in a million there a thousand others just like you."
2007-04-16 06:15:24 · 5 answers · asked by ? 1 in Science & Mathematics ➔ Biology
It's hard to say exactly.
There are about 20,000 genes in the human genome that make you what you are. Some of them have been unchanged for billions of years - primitive bacteria often share some of the same proteins as humans simply because those DNA sequences do what they're supposed to do very, very well.
But even if we (arbitrarily) say that 99% of your genes are exactly the same as everyone elses, and of the remaining one percent that there are (arbitrarily) four variations, we still get more than 10^120 possible humans. Considering that only about 110 billion people (10^11) have ever lived, it would seem that the odds that you are not unique are mind-numbingly small.
And that's not even counting the parts of your DNA that aren't in genes. About 90% of your DNA doesn't actually produce anything. These segments show the most variability in people... it's one of them that we use for genetic fingerprinting. Since those might be almost anything at all, it would be possible to by physically indistinguishable from another person but still have 90% of your DNA be completely different!
Consider all the variations you see around you: colour, size, ability, biochemical feature, etc, etc, etc! While it's POSSIBLE that someone has all the same combinations you do, even twins often have slightly different DNA makeups due to the frequency of mutation and recombination. So cheer up - you almost certainly ARE unique!
2007-04-16 07:56:46 · answer #1 · answered by Doctor Why 7 · 0⤊ 0⤋
DNA fingerprinting that is going on now days is consistent with unique repetitive DNA sequence that we inherit from our father and mom. comparable twins could have the comparable set of those sequences. bear in mind that your DNA codes for all of the proteins you need to maintain your existence applications. that's the proteins on you cells and tissues that reason the matters with organ transplants and blood transfusions. so which you could objective and tournament up the cellular/tissue protein varieties as close as achievable to circumvent transplant rejection. besides, in case you had an organ transplant you may contain distinctive DNA, yet in simple terms in that organ. In blood transfusions the purple blood cells have not got DNA in simple terms the white blood cells do and the blood cells are replaced after some weeks. So transplanted DNA does no longer look in fingerprinting except you took the DNA from the transplanted organ's cells.
2016-12-16 07:28:59 · answer #2 · answered by ? 4 · 0⤊ 0⤋
No, not if you happen to have an identical twin.
Otherwise, your DNA (deoxyribonucleic acid) represents a "genetic blueprint" and, like a fingerprint, is unique to you.
No two human individuals are composed of the exact same genetic profile (unless again, you have an identical twin), and your DNA cannot be purposely altered in any way.
2007-04-16 07:37:54 · answer #3 · answered by Niotulove 6 · 0⤊ 0⤋
no all diffrent that 2 persone can have is 0.1%
2007-04-16 06:55:05 · answer #4 · answered by farzy_sh 2 · 0⤊ 1⤋
no its not,,, your DNA is very common among morons
2007-04-16 06:31:26 · answer #5 · answered by junkie 2 · 0⤊ 1⤋