Question

Your alien friend from planet Xenon is visiting and wants to learn how to breed pea plants. You show your friend a recent batch of pea plants with purple flowers that you grew by crossing plants that had purple flowers with plants that had white flowers. Your alien friend is confused as to why your plants all have purple flowers. How would you explain, in the simplest way possible, what happened?

Answer 1

The bit in the plant responsible for making the purple plants purple was stronger than the bit making the white ones white, and so the children of the purple and white flowers will always be purple.