Probably female, because of the breast color (taken in conjunction with the rest of the color/pattern.)
Still has the single comb and I think the feet look yellow.
Standard size, not bantam, right?
I wonder if you have a Silver Leghorn:
https://www.mcmurrayhatchery.com/silver_leghorns.html
Their Dorkings should have white feet, not yellow, and would have an extra toe on each foot. Probably easy to rule in or out by counting toes.
https://www.mcmurrayhatchery.com/silver_gray_dorkings.html
Other than that:
I can't decide whether I'm seeing any barring or not. That can be hard to spot on multi-colored chicks. If there is barring, probably Bielefelder, chance of Cream Legbar (I'm not seeing a crest on the head, but it's still young enough that a crest might not be visible yet.)
If no barring, maybe Brown Leghorn or Welsummer.
Chance of Whiting True Green, but I think the odds are fairly slim on that one (from the photos, they may be able to come in that color/pattern, but other patterns are probably more likely.)
I feel that it doesn't have as much gold/red tint as I would expect in the feathers for Bielefelder, Welsummer, and some of the others. That's why I put the Silver Leghorn as my first guess. But I could be wrong about what shades are how likely on which breeds, given that I'm comparing your photos with theirs, and that's the kind of thing that can be easy to mis-see in photos (light source, shadows, background color, displayed on a different monitor: easy enough to have the same breed or even the same chick look quite different in different photos.)
The comb looks a bit big, so maybe a breed that would grow a large comb and/or mature quickly (because I'm pretty sure the coloring says female no matter what size that comb is. The only way to get that color on a male would be to have the hen-feathering gene, which McMurray shouldn't have in any of the breeds I am considering.) So that's another point in favor of Leghorns: they have large combs and mature early.