What are the odds of inheriting no DNA from a great, great, great grandparent?
This is a great question and probably one that a lot of people would be curious about. The quick answer is that the odds are pretty close to 100% that you have DNA from your great, great, great grandparent. If you know anything about how our DNA is passed on, this might seem weird at first. DNA is passed down to the next generation in big chunks called chromosomes. Every generation, each parent passes half their chromosomes to their child. If nothing happened to the chromosomes between generations, then there would be around a 1 in 8 chance that you would get no DNA from a great, great, great grandparent.