The first one is definitely a pullet.
I believe this above pullet and cockerel are full brother and sister. I like this girl- originally thought to be a cockerel until she failed to grow any saddle feathers.
What I can see by looking at these Buckeyes if genetics hasn't changed, these birds are Columbian Restricted (co) which restricts black to neck and tail, the same pattern seen in Brahmas, Sussex, etc. Also, they have Db (dark brown- as in Rhode Island Reds and New Hampshires) which adds the brown in their bodies. The same also perhaps explains why they have a light coating of the same red down their outer legs. Not the above pullet... they also have the pattern gene Pg. They started as eb (partridge) chicks with typical partridge markings
Ok- reading the SOP- they need to have tails 30 degrees above horizontal. Most of these Buckeyes are pretty much horizontal. They do have the correct comb- a very neat pea comb in most of the females, and not overly large in the one cockerel. Correct eye and leg colour, I think.
I take pictures of this girl a lot because she's always around. Disregard the Welsummer cockerels in the pictures.
I can see where some look somewhat more like Cornish in the face, Cornish have a particularly "serious" face, like an eagle does!
Looking at an old SOP, I guess they really aren't too bad, and certainly could be allowed to grow and mature more.
You lose me on all the color genetic lingo. I have a book here I intend to read this winter, but I get lost very quick on the whole vernacular used by some of you.
I wouldn't be breeding that pullet in the picture with the two Wellie boys. She has some other pattern really messing with her color, looks like some Partridge. I would have to wonder if there is some Welsummer in her or if she has some Chantecler in her. That would be my personal evaluation of her, you can, do what you see fit, of course.