Headspot = male?

[ArcticBark]

This wee 3-day old one is a crossing between a cream legbar rooster and a black copper marans hen. It has a solid, but fading yellow spot on its head (barely visible in pic). Does the headspot automatically mean it’s a male?

I know next to nothing about chicken genetics and the more I read, the more confused I get...

 

[The Moonshiner]

No it doesn't mean male.

 

[JacinLarkwell]

Because the rooster is a barred one, all chicks will have barring. If the mother had been barred and the father not, then yes it would mean a head spot = male

 

[ArcticBark]

Because the rooster is a barred one, all chicks will have barring. If the mother had been barred and the father not, then yes it would mean a head spot = male

Ah! Makes sense—very helpful, thank you!

 

[TheOddOneOut]

Barring genetics are very interesting.

Females can only ever have one copy of barring, no matter what breed or cross they are.

Males can have one, or two, depending on breed or cross.

When you breed a male with two copies to a female with one, she passes a barring gene to her sons, and he passes it to all his offspring. That’s how males are always double barred in pure crosses.

But if you cross a barred female to a non barred roo, you get barred sons only. That’s a form of Sexlinking.

If you cross a double barred male to a non barred female, all offspring will be single barred. Both genders. No sexlinking.
Your chick is this cross.

If you cross a single barred male to a non barred female, you get barred girl babies and nonbarred boys.

A single barred male to a barred female = all single barred offspring.

Hope this helps!

 

[ArcticBark]

Barring genetics are very interesting.

Females can only ever have one copy of barring, no matter what breed or cross they are.

Males can have one, or two, depending on breed or cross.

When you breed a male with two copies to a female with one, she passes a barring gene to her sons, and he passes it to all his offspring. That’s how males are always double barred in pure crosses.

But if you cross a barred female to a non barred roo, you get barred sons only. That’s a form of Sexlinking.

If you cross a double barred male to a non barred female, all offspring will be single barred. Both genders. No sexlinking.
Your chick is this cross.

If you cross a single barred male to a non barred female, you get barred girl babies and nonbarred boys.

A single barred male to a barred female = all single barred offspring.

Hope this helps!

Very, very helpful, thank you. No wonder I got confused!

 

[The Moonshiner]

Barring genetics are very interesting.

Females can only ever have one copy of barring, no matter what breed or cross they are.

Males can have one, or two, depending on breed or cross.

When you breed a male with two copies to a female with one, she passes a barring gene to her sons, and he passes it to all his offspring. That’s how males are always double barred in pure crosses.

But if you cross a barred female to a non barred roo, you get barred sons only. That’s a form of Sexlinking.

If you cross a double barred male to a non barred female, all offspring will be single barred. Both genders. No sexlinking.
Your chick is this cross.

If you cross a single barred male to a non barred female, you get barred girl babies and nonbarred boys.

A single barred male to a barred female = all single barred offspring.

Hope this helps!

SF barred male to non barred female = 50% barred and 50% non barred. Both sexes.
SF barred male to barred female = 25% non barred females, 25% barred females, 25% SF barred males, 25% DF barred males.

 

[TheOddOneOut]

Very, very helpful, thank you. No wonder I got confused!

It’s confusing!!! Good luck.

 

[TheOddOneOut]

SF barred male to non barred female = 50% barred and 50% non barred. Both sexes.
SF barred male to barred female = 25% non barred females, 25% barred females, 25% SF barred males, 25% DF barred males.

SF= single factor?
Ah, so I was wrong. Interesting! Thanks for the correction.

 

[The Moonshiner]

SF= single factor?
Ah, so I was wrong. Interesting! Thanks for the correction.

Ya SF = single factor. One copy barring, one non barring.
So he has a 50/50 on which he passes on.
You got the idea.