Genetics, Dna, Ancestry, Simulation, Python.
further and found that I wasn’t the first person to discover this phenomenon. Here’s how it works: both parents, or 100%, can contribute X-DNA. However, a paternal grandfather cannot make a contribution, leaving 3/4 (or 0.75) of grandparents. Only 5/8 (or 0.625) of great-grandparents can contribute