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JAMB Biology 2001 Question 42

Question 42

Mendelian Inheritance

A tall plant crossed with a dwarf one produces offspring of which half are tall and half are dwarf. What are the genotypes of the parents?

  1. A.TT, TT
  2. B.Tt, tt
  3. C.TT, tt
  4. D.Tt, Tt.
Show the answer and explanation

Answer: B (Tt, tt)

Explanation

Tt × tt gives Tt and tt in equal numbers, so half are tall and half dwarf.