Human and chimp DNA have both been fully sequenced, and they show evidence of common ancestry in the same way that DNA of 2 humans shows evidence of common ancestry (except that the last common ancestor of humans and chimps was farther in the past).
How is it sequenced to arrive at this conclusion?
This is an assumption, based on what you THINK happened.
The parts are basically the same, yet, we cannot create a human-chimp offspring. (Who has tried a chimp-human one?)
Where is our CLOSEST animal critter? why can we not BREED with them?