Krypto if its in day 10 from seed, you aren't going to know now.
Height is affected by many things.
Strain and lighting are the most obvious, as guerilla has said, if its sativa its tall, if its indica its short. These are just general rules of thumb, of course, you could have a cross, so it would be a mixture of both.
If your using poor lighting, your plants will grow very thin and very tall, regardless of what strain it is, because the plant is reaching for the light.
If you want it between 3-6feet, then my advice is Veg it for 2 months ( 8 weeks ) without topping it, then start flowering it.
This will virtually guarantee a tall plant. I'm on my first grow and didnt top it, I had very poor lighting untill week 7/8 from seed. Using only 1 100w mini fluro.
I'm in the third week of flowering skunk no.1 and the plant is a little over 4 feet.
The nodes are spaced out, quite a bit, check out my previous post's with pics for examples.
BTW--- if it's 10 days old, you won't know if they are male or female, you would either have to wait to see pre-flowers, (flowers that appear before you start the official flowering process) balls = male. white hairs= female.
Or start the flowering cycle and wait and see, the signs will start appearing at the top node of your plant, so be sure to watch for them.