Chicken genetics: BO roo over BA hen

[Sahraschweiss]

Had a hen go broody and hatched 4 chicks. I only have one rooster and he is a hatchery grade buff orpington. Two of the chicks are from what is believed to be black Australorps but more likely black sex-links.

It was my understanding that black gold chicks would be females and mostly buff would be males.

But I have one chick at 5 weeks that is looking very much like a black and gold cockerel.

Please, help me with chicken genetics.

 

[JacinLarkwell]

If they're out if a black sexlink, they will not be sexable no matter who the father is

 

[Sahraschweiss]

If they're out if a black sexlink, they will not be sexable no matter who the father is

That's what I thought.
There's another chick nearly identical except for the combing.