I am tired and a wee bit cranky, and I apologize if this comes out snarky.
Someone just asked on a blog post, somewhere, that I can't find... "Should I address my query to Jenny or to Jodi, since Jodi reads the queries first?"
The answer: ME
You address them to Jenny. I am the agent. Jodi is wonderful, but she is not the one who will be representing your book, and if she ever decides to stop being my assistant... the queries should still be addressed to me.
Repeat after me:
"Dear Jenny" or "Dear Ms. Rappaport" or "Dear Grand Poobah of The Rappaport Agency".