Male vs Female

I'm about a month in and some of my plants are showing crystals. others are not.

i would imagine the ones that are crystallizing are female. when will i be able to tell if the others are male?

when should i separate the plants from one another? now?

do male plants grow buds?

appreciate everyone's help!

Linking to info.
http://www.marijuana-seeds.net/malefemalegender.gif
Male plants grow balls, female plants grow circular balls with 2 pistils coming out of it in the shape of a V. May sound complicated but once you see a male and female its unmistakable.

No males plants do not grow buds. They grow pollen sacks. Females produce the buds.

I seperated my plants in veg because they showed sex then, just get the males out as soon as possible or youll end up with seedy bud.