*will mark brainliest if correct*

answer !

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 yellow flowers that you grew by crossing plants that had yellow flowers with plants that had green flowers your alien friend is confused as to why your plants all have yellow flowers. how would you explain, in the simplest way possible, what happened?

This is all about dominant and recessive genes. According to the picture it looks like the yellow flowers have the dominant genes YY and the green flowers the recessive yy. You breeded the YY with the yy to get Yy.  Now you have a plant with the dominant and recessive gene. The green flowers are  recessive so if you breed 'y'  with anything you get yellow flowers whether they only have the'Y' gene or the both 'Y' and 'y'.

they dont have any evidence