radio wrote:Mtu Biz wrote:
Interesting.
How far back does it go ?
I would also wish to know how the get this other DNAs to compare with. Like how do they know these countries
Not countries but regions! To start with Mitochondrial DNA tracking helps in drawing your matrilineal parentage. Mitochondrial DNA is a virtually unchanging part or your cell that you get from your mum which mutates every 20000 years and so you can trace back and know where the mothers of your mother of your mother came from. Using this we all know that we all share MtDNA fragments that date back to 150k years ago. That woman virtually all tested human beings on the planet have MtDNA from is nicknamed Our "Mitochondrial Eve". You can also test the paternal side by testing the Y chromosome which is passed down by the father. these two can tell you who your dad's dad was e.t.c. By the way for men... factoring in the mutations and time between mutations on the Y chromosome we can date back all males as having a common father who lived some 100k years ago... nicknamed the Y chromosomal Adam! it's then fair to then say... Adam and Eve existed but not at the same time

quot;

quot;

quot; However, we also have other alleles that can be used to test. Humanity for a large period of time was not interbreeding as fast as we currently do now and so we had alleles that popped up on a map due to mutations and can be extrapolated forward. a good example is the recessive allele that gave some africans ability to withstand malaria and when both parents passed it down to the children you ended up with sickle cell anemia. Or even specific gene responsible for the blue eyed people... or green eyed people. Curly haired people... or a certain allele that gives the twa people (pygmies) resistance to forest parasites and has the side effect of inhibiting growth hormone production.
Factoring in the mutations and comparing that to a word database of genes you can know where people come from.... at least their regions. For example, we know Maasais are not "nilotes" in the broader sense of nilotes like Turkana but rather have some cushitic influence.... the maasai are about 20% Ethi-Somali.
All Mushrooms are edible! Some Mushroom are only edible ONCE!