What can my science fair biology experiment be about??
the only thing I can think of is to do a genetics project on your family. you could take a simple trait that’s either dominant or recessive, look at what you have and maybe what your siblings/parents have and then form a hypothesis about other relatives. Some simple traits I can think of off hand are: widow’s peak (hair line), earlobes being connected or disconnected from the side of your head, the ability to roll your tongue or blood type (blood type is a bit more complicated though, which could be good). I’m not sure how hard that would be for you or if it would constitute and experiment insofar as your school is concerned.
