If your great-grandparents are the same person—meaning a single common ancestor—the risk increases, but it is not a certainty. It depends heavily on the specific genes they carried, yaar.
Studying here in Tamil Nadu, my textbook says one thing, but in my village, many families have such histories and mostly have healthy kids. The real worry comes only if that ancestor carried a bad gene, which gets amplified.
So, don't panic based on just that fact. Get a proper genetic counselling if family history of a disorder exists. My professor always says, "Statistics are for populations, but your family's story is your own.
#exams#study
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