What kind of polish is this? Gender?

[Lynnschickens]

About 4 weeks old

 

[BantamLover21]

Its too young to sex.

 

[FrizzledSilkie]

I agree with the other commenter, this polish is quite a ways away from being sexable! You might be able to make a decent guess judging from its personality (for instance, cockerels tend to act bratty as juveniles) but its a nowhere near reliable method of sexing. Good luck with the chick! I'm sorry I can't help with what kind of polish he/she is, but I'm sure the bird will grow up to look awesome either way