If a heterozygous plant seed color (Rr) is crossed with a homozygous recessive plant (rr), what is the probability of each seed color being produced?

If you draw the chart that crosses which genes each offspring would receive, the answer would be Rr, rr, rr and rr. With that you would say there is a 1 in 4 chance of getting Rr and 3 in 4 chances of getting rr.