If doubly heterozygous SsNn cactuses were allowed to self-pollinate, the F2 would segregate in which of the following ratios?
A) 3 sharp-spined : 1 spineless
B) 1 sharp-spined : 2 dull-spined : 1 spineless
C) 1 sharp spined : 1 dull-spined : 1 spineless
D) 1 sharp-spined : 1 dull-spined
E) 9 sharp-spined : 3 dull-spined : 4 spineless
Ans: E) 9 sharp-spined : 3 dull-spined : 4 spineless
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