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Home > Relationship Tests > Grandparent to Grandchild DNA test

Grandparent to Grandchild DNA testing

There are 3 major testing options for Grandparent to Grandchild testing:

  1. Grandparent to Grandchild DNA testing To establish whether or not particular grandparents and grandchildren are biologically related
  2. Grandfather to grandson – Y Chromosome Test
    Men have one Y chromosome, which is passed down to their son and then to their grandson. So testing the Y chromosome will show us If the grandfather and grandson are biologically related.
  3. Grandmother to granddaughter – X Chromosome Test
    The flow of X chromosome from mother to son to granddaughter means an X chromosome test is more applicable
  4. Other possibilities
    We can also test other regions of DNA other than X and Y in specific circumstances where the flow of either X or Y DNA is not applicable. A table with the grandparent to grandchild relationships is listed with the cost of each test.


Summary of X CHROMOSOME Testing Costs: Rs 0 for 3 people (Rs XXX for each additional person) :

Testing for paternity of a grandchild with a grandparent
Must also have
Better with
Cost
Grandfather to Grandson
(Y chromsome test)*
-
-
Rs xxx
Grandfather to Granddaughter Grandmother or Mother's DNA both Grandmother and Mother's DNA
Rs xxx
Grandmother to Grandson Grandfather or Mother's DNA both Grandfather and Mother's DNA
Rs xxx
Grandmother to Granddaughter
(X chromosome test)*
- Mother's DNA
Rs xxx

 

*About Y chromosome DNA testing

To establish whether or not a grandfather and grandson are biologically related, Y-chromosome testing is your least expensive option, nevertheless obtaining a very high accuracy (99.9%+).

Every man has one Y chromosome (women have no Y chromosome). A father passes his Y chromosome to all his sons. Hence, a grandfather and grandson, if biologically related, will have the same Y chromosome DNA patterns.

*About X chromosome tests

To establish whether or not a grandmother and granddaughter are biologically related, X-chromosome testing is your least expensive option, nevertheless obtaining very high accuracy (99.9%+).

A grandmother will pass one of her X chromosomes to her son who will, in turn, pass that X chromosome on to his daughter. Hence, a grandmother and granddaughter, if biologically related, will have exactly the same X chromosome patterns.

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