Complete this Punnett square to show the possible allele combinations of the offspring produced when two pea plants are bred. In this Punnett square the top row shows the alleles of parent 1 and ...

Mendel chose to cross a pea plant that was homozygous and dominant for round (RR), yellow (YY) seeds with a pea plant that was homozygous and recessive for wrinkled (rr), green (yy) seeds ...