Sorry, but there is no way to tell anything from the pictures you have posted.
Firstly the plants need to be a certain age before they will display any pre flowers and secondly you need to be looking where the branches meet the main stem, as this is where the first pre flowers/primordia will appear. For an idea of what to look for, have a look at my diary "Holy Mackerel" / Cannabis Conundrums, where I have posted pictures of both male and female primordia. Hope this helps,.. Organoman.