About human DNA sequence identity
Posted 04 December 2010 - 07:53 PM
We are often told that the human genomes share 99% sequence identity and I am a little bit confused about such an "assumption".
How can we claim this finding while we never sequenced all human genomes in the world to know and compare their sequences and conclude results! So, how this high percentage of sequence identity was concluded for all people (i.e. ~ 6 billion humans)?!
How we could be sure that all people on earth have this high percentage of sequence identity?
Since the human genome was sequenced using the DNA of few individuals, and unless we sequence all human genomes in the world, how we could be sure that human beings share 99% sequence identity?
I am a little bit confused about this issue.
Does somebody has any clear idea ?
Thanks for any feedback
Posted 05 December 2010 - 02:12 PM
Conservation of genes and the number of people sequenced for some genes.
Recent study showing Japanese having different genome(I'm sure if you do a web search you'll find it).
Posted 06 December 2010 - 08:36 PM
No it is not! !
Does sequencing of some genes in number of people is enough to claim that humans (all people on earth) share 99% sequence identity? Without speaking about other genomes and other species (that we also claim having a high percentage of sequence identities with their genomes!)
Unless we sequence all genomes, claiming similarity betweens species or humans as high as 99% isn't an overstatement based on theoretical assumption only??
Edited by Biog, 06 December 2010 - 08:37 PM.
Posted 07 December 2010 - 08:17 AM
genius does what it must
i do what i get paid to do
Posted 07 December 2010 - 10:21 PM
"The haploid human genome occupies a total of just over 3 billion DNA base pairs."
So, even if we are just 1% different from each other, 1% of 6 billion bp should be enough to accomodate known and to be discovered mutation in us...
Image copyright: Adrian Koh SF.
Replication of this art is strictly prohibited without express permission of the artist
Posted 08 December 2010 - 03:59 AM
Posted 11 December 2010 - 06:20 PM