I dont know much about other schools but bio grad students at my school know jack shit about mathematics and statistics, and you can tell by their level of statistical analysis on their research. My research focus (and most of what I know in general) is on bioinfomatics, modeling and machine learning so most of what I'm interested in concerning biology is somehow related to mathematics.
But then again, this is a grad level intro to cell/molecular bio class so I shouldnt have assumed that I could present on whatever I wanted