The phenotype of a plant with the genotype rr depends on the specific gene and inheritance pattern, but generally:

• If the gene follows simple Mendelian inheritance with complete dominance, where R is the dominant allele and r is recessive, then a plant with genotype rr will express the recessive phenotype. For example, in pea plants where R codes for red flower color (dominant) and r for white (recessive), the rr genotype results in white flowers

• In snapdragons, where flower color shows incomplete dominance between red (R) and white (r), the rr genotype results in white flowers because there is no red allele to blend with white

• In pea plants, for traits like seed shape where round (R) is dominant and wrinkled (r) is recessive, rr plants have wrinkled seeds

In summary, the rr genotype typically produces the recessive phenotype, such as white flowers or wrinkled seeds, depending on the trait studied