My son is biracial as well and i was worried he'd always have straight hair (I'm black and wanted him to look more like me you know). Anyway, the day after he turned 1 his curls just came out of no where! Literally, id kinda given up, then after his birthday they literally showed up out of no where. He's like 3b/3c now. He's also blonde now lol. Anyway, his curls may come back after his first birthday like my sons did.