Read an article that there is a 0.02 % difference in DNA between all humans regardless of colour wow Please Register or Log in to view the hidden image!. However what does this actually mean ? does it mean that we have 99.98 % of our DNA code is common to everyone ?
Here's a relevant sentence: "the genetic difference between humans and chimps is less than 2%,[3] or 20 times larger than the variation among modern humans" from this link: http://en.wikipedia.org/wiki/Human_evolutionary_genetics
I don't think that %difference matters that much . . . maybe just an indicator for quick comparisons. . . if someone were born without the genetic code for arms and legs (assuming that were possible) . . . would they be less human? How much could a person's DNA be altered and still result in a human? Although the 0.02%D may be a result of the genetic bottleneck . . . would be my guess.
Humans have had genetic bottlenecks in the past. Here's a link: http://en.wikipedia.org/wiki/Population_bottleneck
Actually it quite simple to make someone technically inhuman, swap a chromosome arm for example and now that person is technically a different species as he can't breed with other humans as the offspring would be missing vital genetic material. But in all of this not a single gene has been changed and depending on how one does the test for homology their DNA would be still by 99.98% the same.
IMO, the difference in total DNA causes the whole genetic relation question to collapse onto one spectrum/metric (%). We know that some people can survive rather well with seemingly massive genetic disruption (eg, single X women), but that some people can die from a couple of SNPs (eg, Duchenne Muscular Dystrophy).
So it doesn surprise you guys that in terms of DNA we are very similiar ? like asians and blacks are almost identical genetically ?.
Well it does go to prove that all our ancesters did come from africa Please Register or Log in to view the hidden image!
