A horticulturist wants to produce geraniums with specific characteristics. She knows that the trait of red flowers is governed by the allele R (RR and Rr) and the trait of white flowers is governed by the allele r (rr). What do the letters in each box of a pinnet square indicate?

[] the possible combinations of alleles in offspring based on the parents’ genetic makeup

[] the full pedigree of the geraniums

[] that both parents show characteristics of the dominant trait

[] how to assemble a genetic map of the chromosome on which the alleles are located