From my experience, bumblebees are not a great example to learn how to ID YB. I purchased a bumblebelly as it was labeled, I thought it had YB and other experienced breeders also agreed it had YB. I grew her out and bred her, turned out no YB. My point is bumblebellies can look like bumblebees and bumblebees can look like bumblebellies. You can breed her to find out but I doubt anyone here can tell you with any certainty if she has YB. You will have a much easier time learning how to ID YB with many other combos that have the obvious traits of YB.
But to give you my opinion, she does look like she could be YB based on the checkering on the sides of her belly. Unfortunately that's not a definite indication because mine had that as well.
Good luck with your future projects.
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