A horticulturalist wants to produce geraniums with specific characteristics. She knows that the trait of red flowers is governed by the allele [tex]r[/tex] ([tex]rr[/tex] and [tex]rr[/tex]) and the trait of white flowers is governed by the allele [tex]R[/tex] ([tex]RR[/tex]).

A cross of two geraniums yields offspring that are 25% [tex]RR[/tex], 50% [tex]Rr[/tex], and 25% [tex]rr[/tex].

Which choice best represents the alleles of the parents?

A. [tex]Rr[/tex] and [tex]rr[/tex]
B. [tex]rr[/tex] and [tex]rr[/tex]
C. [tex]Rr[/tex] and [tex]Rr[/tex]
D. [tex]RR[/tex] and [tex]rr[/tex]