12 replies to this topic

[jrg23]

Is it right, that all humans have to 99% the same DNA?
Does an african have to 99% the same DNA as an asian?

[rktpro]

Is it right, that all humans have to 99% the same DNA?
Does an african have to 99% the same DNA as an asian?

From where you got the 99% fact?
It is though right that humans have same genetic composition and hence fairly similar and not identical DNA structure.

[questionposter]

From where you got the 99% fact?
It is though right that humans have same genetic composition and hence fairly similar and not identical DNA structure.

No wait, isn't it just plain and simple that the genetic variation from human to human is only about .01-.02%?

Edited by questionposter, 15 April 2012 - 01:31 AM.

[rktpro]

No wait, isn't it just plain and simple that the genetic variation from human to human is only about .01-.02%?

All humans have 23 pairs of chromosomes and that makes them genetically similar. What is accounting for .01-.02%?

[questionposter]

All humans have 23 pairs of chromosomes and that makes them genetically similar. What is accounting for .01-.02%?

Like the actual same genes and same proteins in the same order, as in you could replace 99.98-.99% of your genes with someone else's and you'd essentially be the same person.

Edited by questionposter, 15 April 2012 - 03:23 AM.

[Joatmon]

From the link:- http://en.wikipedia....humans_and_apes

"Genetic distance. Given below the diagram, the genetic difference between humans and chimps is less than 2%,^[3] or 20 times larger than the variation among modern humans."


This seems to support the OP?

[jrg23]

Every human has 20000 genes and all humans have to 99% the same DNA.
Are there 19800 genes the same in every human and there are only 200 (1%) individual genes?
And between relatives there are maybee only 100 or 50 individual genes!?
Is this right?

[Anders Hoveland]

A mouse has 97.5% of the same DNA that humans do. Obviously that 2.5% makes a huge difference.

A chimpanzee has 98.8% of the same genes that humans do.
http://www.scienceda...11025122615.htm

Small genetic differences result in very significant differences.

[jrg23]

Thank You, but is it right that there are 99% the same genes or is every gene to 99% equal?

[CharonY]

The differences are allele variations. We carry essentially all the same set of genes, but different variations thereof.It depends a little on what you look at and how you count differences, though.
If you compare the naked sequence, for example, you can expect an average difference of around 0.1% for any given stretch of DNA between any two humans. I.e. one base exchange for each 1000 base pairs.
So by that measure it is closer to 99.9%.
However, copy number variation, e.g. duplicates of certain regions, may increase the variance, up to around 0.5%, IIRC. But all measures would point to difference well below 1% for any two individuals.

Edited by CharonY, 16 April 2012 - 12:08 AM.

[Phi for All]

Apparently your lack of intelligence has resulted in you being completely unable to comprehend the vast difference between 2-3% difference (human to mouse) and a 0.01-0.03% difference (human to human). 

Are  you really so daft as to be unable to understand to galaxy wide gap between these numbers.  There is a extremely significant difference between 2-3% and 0.01-0.03%...  Have you ever taken a basic course in mathematic or algebra?  Perhaps you should, that you can learn the pencentages better.

Let me put it this way.  Say I'm playing the lottery with a 3-4% chance to win.  Statistically, I would win once every 1000th game, that's a lot of lottery tickets and in real life lottery tickets have an even smaller win percentage.  Now change that win chance to 0.01-0.03%.  You will find that with such a percentage  you will only be able to win every 1,000,000th game.  If  you think of this in terms of biology, obviously a fucking mouse has over 100 million differences when compared to a human being.  Whereas, human to human the differences is close to 3-6 from human to human, even when it comes to a human from the same culture that par takes in the same climate and dietary patterns, 1 of those changes might rarely include neurological function.  Einstein wasn't naturally a genius, he WORKED very hard for his intelligence.  Nikola Tesla, a well known genius, as a genetic anomaly, as in the true natural genius is extremely rare regardless of what culture or corner of the world you come from. 
That's quite a significant difference isn't it, monkey?  Try using your brain before you post next time, primate.
 

!

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[Mr Monkeybat]

 A chiuaua also shares 99.9% of his DNA with a Great Dane.

 

You also share over half your DNA with a Banana.

 

Obviously crude measures of genetic similarity tell you little about how similar a life form is in form and behavior. The figures given will also differ wildly depending on the criteria  used to compare the DNA. Its best use is estimating the date of the common ancestor.

 

[Manfromzurich]

A human has 3 billion basepai letters. Only ca, 3,4 until 3,5  million base letters vary between two persons. that this 1% you have spoken about. But there is also difference cause of deletions, insertion and copy number variation. If you add this geentic difference to the SNPs , than there are ca. 98% until 99% similarity between two humans.

Edited by Manfromzurich, 26 January 2013 - 08:29 PM.