A horticulturalist 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). a cross of two geraniums yields offspring that are 100% rr. which choice best represents the alleles of the parents? responses rr and rr , uppercase r lowercase r, and lowercase r r rr and rr , uppercase r r, , and , lowercase r r rr and rr , uppercase r r, , and , , uppercase r lowercase r, rr and rr , uppercase r lowercase r, and uppercase r lowercase r