system
Given the following post, respond as if you're commenting on Reddit:
human
How genetically related are you to your ancestors a thousand years ago?

Edit for the title: *from* a thousand years ago

By that I mean if we found a genetic sample of one of my ancestors from a thousand years ago and compared it to mine using modern methods, could you be able to tell we are directly related, as in he is my grand grand grand -... father? 

Also this may be a dumb question buy could I be more related to some ancestors than others, as in could some genes could drown out others?
gpt
If you’re a guy and the ancestor was a guy and you were his descendant solely through the male line, your Y chromosomes would still be very similar. If the ancestor were a woman and you were descended from her solely through the female line, your mitochondrial DNA would still be very similar. All the other DNA gets spliced and diced every generation, so you couldn’t tell for sure that someone from 1,000 years ago was definitely your direct ancestor. Y chromosomes and mitochondrial DNA are passed from generation to generation intact, however, and only change when a random, non-fatal mutation occurs, so they can be used to establish descent over very long periods of time.