Day old Marans cross sexing

[mcclucker]

“Males will have a larger, lighter spot on their heads, and lighter colored legs, too. Females will have a smaller, darker spot on their heads, and will have darker legs. The males will be lighter grayish/goldish colored with big head spots and the females will be brown with small head spot.”

From that site...

 

[The Moonshiner]

With your cross you just made it is about there being one or not because you're making sex links. Your hens pass the gene to their sons only. The rooster doesn't have the barring gene so he passes it to neither sex.
With your pure hens you would be dealing with autosexing. Both parents have the barring genes and pass it to all chicks. The rooster passes it to both sexes. The hens pass it to male offspring only. The females end up with one gene so the have smaller more defined spots. Males get two copies so the double dose makes bigger and less defined spots.

 

[mcclucker]

Aaah that makes sense now thank you.

So if this rooster has one copy of the barring gene he would pass that on to all chicks? (He might have some brown leghorn) or just some? Is that trait recessive? (So he’d need two copies to look barred?)

You’d never know i took AP biology in high school lol.