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African American DNA Research Forum

Re: Re-phrasing what's already been said

Oops.. had another thought. E.T., another way to explain, maybe??

Autosomal DNA is the part of the your dna that makes you, you. Each conception is like throwing the dice. The mix of autosomal DNA is different each time.

That is why you do not look exactly like your sibling, unless you are identical twins, which are the result of ONE conception.

If I and my sister test our autosomal DNA, we will not necessarily get the same percentage results. BUT, our mtDNA will be exactly the same.


PS - and just to muddy the waters, those who get Discovery Health channel, watch for "I Am My Own Twin," a truly fascinating documentary about 'chimeras' where, in the very early period after conception, fraternal twins merge into one person. With two differents sets of DNA in one body, sometimes resulting in striped, or checkerboard skin. Or cases where the child is male on one side and female on the other, obviously from the merger of boy-girl twins.

Two cases are followed where the mother is thought not to be the mother of her own biological children. These cases were the result of fraternal twin girls merging. One mother was accused of welfare fraud and her children were about to be taken away from her.

18 Dec 2002 :: 14 Nov 2008
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