If red (RR) is crossed with white (rr) and produces a
pink flower (Rr), and tall (D) is dominant to dwarf
(d), the F2 phenotypic ratio from a cross of RR dd
with rr DD would be
a. 9:3:3:1.
b. 1:1:1:1.
c. 1:2:2:4:1:2:1:2:1.
d. 3:6:3:1:2:1.
e. none of these.
Answer: d
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