Not showing anything yet, it can take up to 6 weeks to show sex (pre-flowers) during veg so yes sex will eventually show, the males usually show sooner then the females.
Alot of times you can spot the males (stretch, lanky branching ect) when growing side by side it's siblings from the same batch but not always.
yep, not a flower on it yet... look closer to the top, that's where they'll show first.
there are no balls, only the joints of the branches (the round things at the base of each branch) and stipules (the spikey things at each node; all plants grow these at each node, male and female so that is no indicator). plants in veg will almost always show by 12 weeks (i've had a very few stubborn ones that didn't sex out until the flip, even though they were more than 3 months from seed), or if forced, usually by the third week of flower. i personally never flower anything until it preflowers, showing it is sexually mature enough TO flower.
if i were a gambler, i'd say it will be female. however, i'm not, and it's too soon to tell for sure, unless there are preflowers closer to the top of the plant.