Quick and simple definition. Females bud males dont. Males produce seeds, and you dont want them around unless your planning to pollenate a female. Sorry for not going into detail but Im alittle hung over . For a more detailed explaination check out the newbie section under indoor growing
males will have little balls and female will have tiny hairs .ps you can smoke males if desperate. but it wont be as strong also may give you head ache . as far as that goes you can even smoke the leaves .