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Refer to the Punnett square shown for monohybrid cross:  This represents:
ALinkage
BMonohybrid cross Tt × Tt giving 3:1 phenotypic ratio in F2
CNo cross
DMendel's dihybrid
Answer & Solution
Correct answer: B. Monohybrid cross Tt × Tt giving 3:1 phenotypic ratio in F2
Monohybrid cross Tt × Tt: gametes T or t (each 1/2). Punnett square 2×2: TT, Tt, tT, tt → 1 TT : 2 Tt : 1 tt (genotypic 1:2:1). With T dominant: 3 tall : 1 dwarf.
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