Not sure this topic is in the correct place but here goes.
I have no knowledge of genetics but I am curious I have always had show cockers range in colour but mostly roans over the years I noticed that my orange roans were always very bold & quite hyper I do agility with my cockers. It was mentioned to me by a well known show breeder the difference in colour dominance on how it effects character & temprement for example he explained over the orange roans that you will find you ask them to do something & they will ignore you until you tell them. My Amy my orange roan has lived to those words

she is & has been very excitable & willful but oh so willing to work for you all the time & all day if you wanted to but a bold little dog.
Now for various reasons I choose an orange & white working cocker puppy as our next family member Jaz is now 2 but her temprement is so different very laid back, easy to train, but very sensitive always rolls over on meeting other dogs very submissive. I do agility with her but she is not confident at the beginning of a run then builds confidence during her run.
On speaking to other worker owners that I know via agility the orange roans/ whites seem to be very similar to Jaz .
So I was just wondering why so different between the 2 types show & worker if as it was explained to me that colour takes a big part in temprement. I know the lines are so different now between show & workers but does colour play a part or not ? & why do workers seem more sensitive than show ?