I've never seen yellow pollen, my pollen was always white as snow.
It might be a male (balls), a female (hairs/pistils) or a hermie (hairs+balls) or your mom got onto your grow room and played a really crappy prank.
What strain are you growing, from which seed company, how old are the seeds, has the plant been placed under any stress, did you originally buy feminized seeds?
A pic would be great.