the bud you see there is the female part of the plant, the male part looks like small round sacks and are filled with pollen. The female part is the part you want the most because of the high thc content, thats the shit that gets you stoned or high it really matters on what type of marijuana you have (indica or sativa or hybrid). Some are taller than others and produce more buds then others. You really cant have an estimate on how many buds per plant.