I can't tell if he is truly lacking in foot feathers or if they are broken off. If broken you need to consider addressing his pen/coop. I won't be redundant and reiterate Chris's comments.
Just as human males have certain characteristics that differ from female characteristics, regardless of their genes, roosters have certain traits based upon their gender, not their genes.
There are male colour areas which include the hackles, saddle, shoulder & wing bay. With silkies, because of their typical E-allele (e^b), you don't (usually) need to worry about the wing bay (triangle formed on a closed wing at the outer end of the wing) or saddle. Female chickens display colour instead on their breasts. Avoid pairing him with any hen whose breast is not clear. As Chris said, your clearest bird. If pairing with a blue, I would go for a bird as uniformly coloured (excluding her hackles, which should be darker) as possible (For example, I have some blues whose breast is lighter than their backs--not what you should choose). If paired with black, as shiny and dark a black as possible. Splash is too variable to give an opinion on choice--for that you would need to do some test hatchings.
As to whether siblings would inherit the lack of melanizing genes? It depends on the parents. Since the specifics of these genes are not well researched or documented, it is very hard to predict their inheritance. Certainly the potential is there that the sisters might have also inherited their lack. But the one cock might also have been the only one who inherited the lack--just impossible to tell without doing some test hatchings.
Just as human males have certain characteristics that differ from female characteristics, regardless of their genes, roosters have certain traits based upon their gender, not their genes.
There are male colour areas which include the hackles, saddle, shoulder & wing bay. With silkies, because of their typical E-allele (e^b), you don't (usually) need to worry about the wing bay (triangle formed on a closed wing at the outer end of the wing) or saddle. Female chickens display colour instead on their breasts. Avoid pairing him with any hen whose breast is not clear. As Chris said, your clearest bird. If pairing with a blue, I would go for a bird as uniformly coloured (excluding her hackles, which should be darker) as possible (For example, I have some blues whose breast is lighter than their backs--not what you should choose). If paired with black, as shiny and dark a black as possible. Splash is too variable to give an opinion on choice--for that you would need to do some test hatchings.
As to whether siblings would inherit the lack of melanizing genes? It depends on the parents. Since the specifics of these genes are not well researched or documented, it is very hard to predict their inheritance. Certainly the potential is there that the sisters might have also inherited their lack. But the one cock might also have been the only one who inherited the lack--just impossible to tell without doing some test hatchings.
