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African American DNA Research Forum

Response to DNA Admixture test statements/question

I am responding to the post below

No, this is not correct. Two whole brothers will both have XY chromosomes, but they will STILL not get identical autosomal dna. They will have identical Y chromosomes, the X will be a tossup as to which they get from mama (Remember, mama got 2. Which is she passing on this time?).

Sister does not get the Y-chromosome from father BUT she does get 50% of her autosomal dna from father and autosomal dna is what makes you an individual, not the gender chromosome.

ONLY (let me say that again) ONLY identical siblings like identical twins, triplets, will get identical dna.

Fraternal twins (which can be two boys, two girls or boy and girl) DO NOT have identical dna because they are the result of two conceptions just like any other two non-twin siblings.

"The X will come from your mother's maternal, maternal.. line" - Not correct either.... scientists cannot say which line Mama's X came from. Which is the reason the X-chromosome is NOT used in maternal line testing. Again Mama got two Xs, one from her father and one from her mother, and which one is she passing on??


18 Dec 2002 :: 14 Nov 2008
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