the white seeds are female i juss started growing a plant in my closet make sure you water them enough and keep a 75 to 100 watt light bulb on it or a UV lamp either on its mad simple
Generally male and female plants have different growth. Some plants if they contain a spore is more easily recognisable as a female, but generally you can just tell from their structure. In some...
male plants are smaller, thinner, seedier, have smaller leaves (overall they suck). The females on the other hand are bigger, thicker, grow bigger leaves (those are the ones you want)
Females will have hairs where the stem splits into 2. Males will grow seeds regardless, females will only grow seeds if they are "seeded" by a male... Or if they are harvested late.