Heredity jokes
Do you ever look at a person and think, "Just how many generations of inbreeding did it take to create you?"
The DNA told the tailor that he couldn't find his genes.
Why did Sally not save the mountain climber?
Because it was her dad.
Your hairline receded just like your father did years ago.
What do you call an orphan's family tree? A stump.
As siblings, we always joke about being adopted. It stops being funny when you're playing in your parents' room and find both of your adoption papers.
Father: "Son, you were adopted."
Son: "What?! I knew it! I want to meet my biological parents!"
Father: "We are your biological parents. Now pack up, the new ones will pick you up in 20 minutes."
Jack and Jill went up the hill to celebrate their marriage.
Nine months later, they happily had some use for their baby carriage.
Two years later, they went up again, then their daughter had a brother.
But one little secret that no one knew was that Jack and Jill share a mother.
Your hairline goes back to when Adam and Eve were born.