Read my post a few times. I said all of that in there. The poster said dark eggs, not just good egg color. To me, dark is on the end if the specrum, such as a 9. Linkage is when genes two traits are found on the same chromosome. The closer they are to one another on the chromosome, the more linked they are. If they are far apart, it is possible that part of the chromosome can break off and join on another chromosome, which is called crossing over.
I have heard that pea comb and the blue egg gene are linked, but it does not appear to be to me either.
I have heard that pea comb and the blue egg gene are linked, but it does not appear to be to me either.