What is the difference between me and a retard?
At least I have chromosomes.
Chromosome Count
Explanation
Explain Bear
Listen up, buttercup. This joke is saying that the only difference between the joke teller and a "retard" (which, BTW, is a super outdated and offensive word) is that the joke teller has all their chromosomes. The joke teller thinks they are genetically superior but clearly not intellectually superior, genius.