Question about the chocolate gene

[Keikuri]

I’ve been doing some reading and was hoping someone could clarify something for me. Last year i hatched out 3 Blue Runner x Blue Swedish mutts. One of the daughters is brown (her sister is mostly black with some brown and brother was blue but now looks like he was bronzed, all with the Swede pattern), a color i assumed came from her Swedish eggdonor. Well i just learned that the brown color comes from the drake.

I dont know if Blue Runners could carry a chocolate gene. So i guess my question is did she get her color from her dad or is it possible to come from the lady?

He also fathered some kids with his Blue Runner wife: 4 Blue, 2 Black, and 2 Silvers (only 2 were girls). If he’s carrying the brown gene would it show up in future Runner offspring?

Thanks!

(Pic of Runner daddy and the little Chocolate Menace herself)

 

[Ratchnick]

My knowlage is limited but this is what i can decipher.

Chocolate is recessive AND sex linked, meaning its only carried on the W chromosome. 2 copies are required for drakes to be chocolate and one for hens. Since drakes are WW and hens WZ any hen that has a chocolate dad will get a W with chocolate gene. This makes the ducklings sexable by down color. Hens are brown.

So in your case you have two blue parents and a brown hen. The loci for the chocolate gene is not on the z chromosome so you know it came from the drake. Your drake has one copy of chocolate which is why he is blue and not lavender. If He was expressing blue and chocolate he would be lavender.

 

[Ratchnick]

Yes he can pass the chocolate gene to other ofspring but only the hens with show it unless the mom is chocolate.

 

[ANightPerson]

I agree with what's above. And if you breed her back to one of her father or to one of her sons they would have a lot of chocolate babies.

 

[Keikuri]

My knowlage is limited but this is what i can decipher.

Chocolate is recessive AND sex linked, meaning its only carried on the W chromosome. 2 copies are required for drakes to be chocolate and one for hens. Since drakes are WW and hens WZ any hen that has a chocolate dad will get a W with chocolate gene. This makes the ducklings sexable by down color. Hens are brown.

So in your case you have two blue parents and a brown hen. The loci for the chocolate gene is not on the z chromosome so you know it came from the drake. Your drake has one copy of chocolate which is why he is blue and not lavender. If He was expressing blue and chocolate he would be lavender.

Got it! Thanks so much!

 

[Keikuri]

I agree with what's above. And if you breed her back to one of her father or to one of her sons they would have a lot of chocolate babies.

I’m thinking of that. She took a fancy to one of her Black Runner brothers. It’d be neat to see if he is hiding the gene too.