system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How much more DNA do we share with relatives than the average stranger?
gpt
Among humans, all but about 0.1% of our DNA is the same. That .1% accounts for all differences we see among humans. Every color, shape, and size.

For identical twins, the DNA is 100% the same. Siblings/parents/children share about 50% (of the .1%). Grandparents/grandchildren it's about 25% (of the .1%).

A distant cousin might share .01-3% (again, of that .1% that's different, not the total).

With a stranger, nearly none of that .1% that makes us unique is shared, but of course, the 99.9% we share with all humans would still be the same.