molted and pudding which gene is dominant?

I guess pudding is dominant gene. Last time I bought my yellow pudding and winter white from Qiezi's friend. The father and mother are the same all yellow pudding. So it only make sense that the pudding gene is dominant, so that then could gave birth to a winter white. The father and mother both are not pure pudding. They are hybrid. 

Last week, I search in internet. Some said moleted gene is a dominant gene and it is easy to carry. I am so curious that when 1 pudding + 1 molten, or when pudding gene meets the molted gene, what gonna happen? haha the fact will come soon...

I have discussed with the Pets Lover Centre's vet. He said the dark color is dominant one. If two light color parents, then the babies will most likely to be light color ones.....I don't believe....