If you're referring to the white one, I'd venture a guess and say cockerel. However, since s/he appears to be your Tetra Tint?, then you may want to wait a bit longer. The Tetra's I've owned in the past have some pretty good sized combs / wattles at an early age.
Can you post some pics of the hackle and saddle areas? Or one of the bird standing, from the side. This one could go either way. My Leghorn and Tetra Tint girls got big combs pretty early, but they didn't go red until just before they started laying.