In hatchery Dominiques, there is some cross breeding with Barred-rocks which have single combs which means you could get a rose or single or somewhere in between. Your avatar hen has a modified rose comb. A true rose comb is very flat against the head. I have a BR Roo and 2 Dominique hens, one of which has a modified rose comb.
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Could you please clarify the difference between a rose and modified rose, and does it occur in both sexes.