Well in the pics you've shared, the yellow ones could be any of four different varieties. Top Right is a black. Bottom right is most likely a Nari (but could be a BR). Nari's have a mix of gray's blacks and white. Bourbon Reds (BR) swap grays for reds, but at this age the red is underdeveloped and can look gray. If you get some barring on the yellow ones as they feather out, then likely Royal Palms (RP). If they remain pure white they could be one of two different varieties. But in the end, the breed is Turkey for all of them.
If you get a chance check out Porter's Turkey's web site. I think you'll find it interesting.
If you get a chance check out Porter's Turkey's web site. I think you'll find it interesting.