The chick coloring reminds me some of my BLRWs but more golden, so the breed could possibly be right? Someone else would know better than me. Wyandottes do sometimes throw single combs. I have a wyandotte pullet with a single comb. I kept her, but won't use her for breeding. As for gender, too early to be sure. If it is a wyandotte, they are tricky to sex. I have a pullet that everyone insisted was a roo, but they were wrong, and she already had wattles at that age.