No, what determines a dominant gene is how many copies of that gene exists within the parent. This doesn't mean it will be the most common because of recessive genes. It doesn't matter how many copies a dominant gene has, a recessive gene can still appear in the offspring.
Answer:
There is alternate splicing of the runner mRNA.
Yes! We can see which are dominant!
In this first generation progeny, we see that stripes are dominant and spots are recessive. And white bodies are dominant over orange!
I am a bit rusty on genetics, but I believe I am correct