To early to tell! Don't sweat it yet. Those may be just little calyxs getting ready to pop some pistles you will know for sure soon enough. It appears you are just reaching the terrciarry stage now (nodes on side branches) just let them go. If there is a male or two in the bunch,It does'nt mean you will have pollen all over the room today, or even in the next week. You have plenty of time to recognize them and cull them out. They will in-fact look much diffrent from one and the other at about week 1 of veg. The males will grow a stock. Little white flowers will begin to bud on that stock when they are ready they will open and pollen can be released into the grow area. The fems will have flowers begining at about 10 days, for most indica predominate strains. Sativa dominate take a little longer. (generally).
In conclusion what you are looking at,( those little dot's ) DO NOT MEAN THEY ARE MALES! so don't make foolish mistakes, I.E. ( pulling those plant's out this early). They look like they could have gone a little longer before blooming. Unless size of grow area is small and this is why you bloomed early, try topping instead, and waiting for pre flowers as well as floral arangement on node areas before switching to bloom.
Let me suggest a good refrence manual try Greg Greens Grow bible (best $35.00) I've spent so far in 30 years of doing this.