Let's say both cousins are related through their grandmother on their fathers' side, but neither have parents or grandparents still alive... so that rules out the possibility of getting a dna sample from them. But if 2 cousins were to take a dna test themselves, is it possible that they could determine whether or not they had the same grandfather on their fathers' side?
ok, I realize that, but if they had the same grandparents, wouldn't 50% of the cousin's blood be similar enough to warrant an answer?
Assume i take a DNA test to know between two men which one is my father and which one is my father's cousin(their fathers are brothers), how do they gonna test it in these two different situations:
A) a test with no sample of my father
B) a test with sample of my father
in both situation a sample of the mother is available.
i am talking about the X-test, Y-test and MT-test(mitochondry test). how do they gonna compare these things?
this is ergent. its my biology test.please help!
thank you.
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