Learning Genetics?

[nicalandia]

I was just wondering if the smooth walnut would've corrected the other comb type.

Plus, I was enjoying soaking up more knowledge of what's happening.

He is R/r+, P/p+ but with the smooth comb mutation(recessive) that is why some of his progeny show a walnut but not smooth(but spiky).

 

[MysteryChicken]

He is R/r+, P/p+ but with the smooth comb mutation(recessive) that is why some of his progeny show a walnut but not smooth(but spiky).

Oh, okay I didn't realize it was recessive. Thought it was semi dominant.

 

[nicalandia]

Oh, okay I didn't realize it was recessive. Thought it was semi dominant.

Rough Comb is He+, Recessive is he

The surface can be rough or smooth. This is caused by the gene He+ (Cavalie and Mérat,1965). The dominant He+ gives a rough surface and causes more pronounced bulges. Its recessive counterpart ‘he’ smoothens the surface. He+ and he have influence on the amount of spikes on the single comb of which the ‘he’ birds show less spikes and He+ birds more (Cavalie and Mérat, 1967). It looks like He+ also has influence on the walnut comb and that ‘he’ is the cause of the smooth surface of the cushion comb

 

[nicalandia]

It's strange that most of your silkies don't have turquoise earlobes

I've been thinking about how would a Spanish White Face would look with a Turquoise face instead

 

[MysteryChicken]

It's strange that most of your silkies don't have turquoise earlobes

I've been thinking about how would a Spanish White Face would look with a Turquoise face instead

Most of my females show blue earlobes more then my males for some reason. Same issue with mine that I acquired from Showstock.

 

[EmmaRainboe]

how frizzled feathering occurs and how to represent that as letters.

I can't get into the exact mutations that cause the feathers to curl, @nicalandia can probably get into that for you.

But I can cover the basics.

There are two alleles, F, and f+.
F represents frizzling.

Frizzling is a semi-lethal Co-dominant gene, and when heterozygous produces frizzles, and when homozygous produces frazzles, which have extremely brittle feathers, and often have other issues such as enlarged organs.

That is why responsible breeders do not breed Frizzle x Frizzle.

F/F x F/F = 100% F/F (frazzles)
F/F x F/f+ = 50% F/f+ (frizzles) 50% F/F (frazzles)
F/f+ x F/f+ = 25% F/F (frazzles) 50% F/f+ (frizzles) 25% f+/f+ (smooth feathered)
F/F x f+/f+ = 100% F/f+ (frizzles)
F/f+ x f+/f+ = 50% F/f+ (frizzles) 50% f+/f+ (smooth feathered)
F