I_AM_AMHAARETZ

https://en.wikipedia.org/wiki/Medical_genetics_of_Jews

http://www.jewishgeneticdiseases.org/jewish-genetic-diseases/

Did your parent get checked before you were born?

Can I introduce to my daughter Rachel? She's a perfumier for Nieman Marcus and her grandfather was a Chazzan.

Don't ask me. My forefathers didn't breed with their own cousins for 40 generations.