Very interesting question. You actually induced me to go do a little reading on corn genetics.
I found two different answers. The simple one says purple or red kernals are dominant and yellow is recessive. Thus your yellow painted mountain kernals would have no P or R genes and their progeny would be yellow.
However, some people give a more complex version in which there are two genes involved, one of which inhibits color expression.
"the type of inheritance is Epistasis (when one gene controls the expression of another)"
Here's a place where they work out an epistasis corn e.g.:
https://answers.yahoo.com/question/index ... 620AA0fM1S
In that case, your yellow corn could have a purple or red gene, but also the inhibitory gene. The inhibitory gene is also dominant, so it only takes one copy. So your corn could be Ii (have a dominant inhibitory gene from one parent and a recessive non-inhibitory gene from the the other).
In that case your yellow corn could pass on a purple or red gene and its I non-inhibitory gene and the next generation could be colored.
And no, I don't think the colors will blend.
BUT I AM NOT A CORN GROWER AND I AM GUESSING. The experiment will be interesting. Keep good notes!
