I agree with lollydi.
I'm not quite sure how important it is for me to know, off the top of my head, some of the obscure genetic translocations they want me to know for the boards. It's a running joke in my residency:
"Quick, Dr. Pathology, this patient is about to die unless you tell me the translocation for synovial sarcoma!"
I guess it's just easy-to-test material.
By the way, I've heard from other residents who've taken the exam that they not only want you to know CML is t(9;22) (obviously easy), but that it's t(9;22)(q34;q11). One resident said her exam had several choices that had t(9;22), but different actual sites listed. I'm assuming this may be true for other common translocations.