Genetic questions!

[Gigachad poultry]

This is the breeding flock, there are like 8 different breeds up in the hens genetics and the rooster carries the duckwing gene and so so half the hens

 

[Amer]

Why would this be? His some of the hens that could have be his mom both carry Duckwing and his dad carries a copy the duckwing gene meaning that the offspring can inherit two copies of the recessive gene instead of the dominant one, Rr x Rr = 25% rr right?

He didn't inherit duckwing from both parents because otherwise he would have the duckwing pattern with the white wing triangle.

Would this hen be Birchen then? View attachment 4130379
And what about this one? View attachment 4130380
This one doesn't look all that Birchen to me...View attachment 4130381
This one however does look Birchen View attachment 4130382

Those are all Birchen based. They have additional genes that add pattern and they are probably split based. Sebrights are pure Birchen base, they have other genes on top of that to add more color.

 

[NatJ]

Rr x Rr = 25% rr right?

Yes, Rr x Rr = 25% rr
But it also gives 25% RR and 50% Rr, which means 75% show R.

I don't think R is the actual abbreviation for any of the genes involved, but the inheritance pattern is the same regardless.

If both parents carry the recessive gene, you expect it to show up in about 25% of chicks. But you expect the other 75% of chicks to show the dominant trait. Your cockerel is apparently showing the dominant trait (Birchen), and we don't know whether or not he carries the recessive trait (Duckwing).

 

[Gigachad poultry]

Yes, Rr x Rr = 25% rr
But it also gives 25% RR and 50% Rr, which means 75% show R.

I don't think R is the actual abbreviation for any of the genes involved, but the inheritance pattern is the same regardless.

If both parents carry the recessive gene, you expect it to show up in about 25% of chicks. But you expect the other 75% of chicks to show the dominant trait.

I don't though, I'm simply examining the offspring from the hatch

Your cockerel is apparently showing the dominant trait (Birchen), and we don't know whether or not he carries the recessive trait (Duckwing).

His dad was a silver Leghorn so yes he 100% carries a copy of the Duckwing gene