GRANDPARENT TO GRANDCHILD DNA TESTING

(Click Here to Order a Free Collection and Information Kit for Grandparent to Grandchild testing)

Grandfather to Grandson, the flow of Y Chromosome DNA.

To testing if a Grandfather is related to a grandson is very accurate using a Y Chromosome DNA test.

All men have one Y chromosome which is passed down, generation to generation through their son's. If a Grandfather and a Grandson have the exact same Y chromsome, it supports them having the same male ancestory (being related).

Because the Y chromosome DNA needs to be exactly the same to support a positive relationship result, the test is highly accurate, above 99.9%.

If you are testing a Granddaughter (females do not have a Y chromsome) then other test types are required. (see below).

Y Chromosome DNA test - Details and cost.

For Grandfather to Grandson testing a Y-chromosome test the best option to achieve a high accuracy with relatively low cost. Because all men have one Y chromosome (and females have no Y's). A father will pass his Y chromosome to all his sons. So a Grandfather and Grandson will have the exact same Y chromsome if they are biologically related.

Testing for paternity of a grandchild with a grandparent.	Cost	Click to buy this test or Order Free Kit
Grandfather to Grandson (cost for both persons) (Y chromsome test)*	$495
Each extra person (extra grandson's, etc.)	$165

Grandmother to Granddaughter, the flow of X Chromosome DNA.

To test if a Grandmother is related to a granddaughter is very accurate using an X Chromosome DNA test.

All males have one X-chromosome that they have recieved from their Mother. Subsequently, this single maternal X chromosome is passed from father's to daughters. (Son's receive a Y chromosome from their fathers).

So, by testing the two X chromosomes in a grandmother, and the two X chromosomes in the granddaughter, we can determine if they are biologically related by finding if they both have one X chromsome exactly the same.

From the illustration left, you can see the flow of X chromosome from Grandmother to Granddaughter, via the father.

X Chromosome DNA test - Details and cost.

For Grandmother to Granddaughter tests, X-chromosome testing is your least expensive option while obtaining very high accuracy (99.9%+). Men have one X chromosome that they receive from their mother. So, a grandmother will pass one of her X chromosomes to her son (the father), and then the father will pass that X chromosome to his Daugther. Therefore a biologically related Grandmother and Granddaughter will have the exact same X chromosome patterns.

Testing for paternity of a grandchild with a grandparent.	Cost	Click to buy this test or Order Free Kit
Grandmother to Granddaughter (X chromosome test)*	$695
Each extra person (extra granddaughter's, etc.)	$195	or

Click to order a FREE Grandparent to Grandchild information and collection KIT

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