river-wind
Valued Senior Member
Originally posted by atheroy
yes, mitocondrial DNA (it is genetically exactly the same for ALL women) has been traced back 200,000 years. this does not prove that we all stemmed from say adam and eve-
this is not accurate. during meiosis,(the cellular division which gives rise to gamete), all mitochondrion are removed from sprem, along with most other cellular structures. The female egg, however, retains the major cellular structures of the mother cell. Every human being (male and female) got all of their mitochondrion from their mother only. Men and women have the same level of similarity in mitochondrial DNA to their parents, it is uneffected by sex.
The Mitochondirial DNA is therefore not a hybrid of both parents, but an intact copy of the mother's mitochondrial DNA from one original cell. This DNA still mutates over time at a steady rate, and this allows us to trace and estimate evolutionary branches based on level of mtDNA diversion between individuals.
And interesting note, there was, according to this midochondrial DNA evidence, a massive population decline (down to about 10% of the original population) sometime around 40,000 years ago. All of those alive today are decendants of a very few individuals from 40,000 years ago
http://news.bbc.co.uk/1/hi/sci/tech/1058484.stm
Rachel married her cousin, Cain married someone outside of the sight of God, though the bible never explains who, given we should only have 3 people in the world so far. Thus we have the Cainanites. An entire population we are supposed to hate because they decended from Cain, a guy who married and had kids with someone who didn't exsist, outside of the sight of an omnitient being. yes, logic.