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JAMB Biology 1983 Question 49

Question 49

Mendelian Inheritance

What is the genetic ratio of the F2 generation if members of F generation are allowed to self-pollinate?

  1. A.1 tall : 3 short
  2. B.3 tall : 1 short
  3. C.1 tall : 1 short
  4. D.4 short : 0 tall
  5. E.4 tall : 0 short
Show the answer and explanation

Answer: B (3 tall : 1 short)

Explanation

Crossing two heterozygous F1 plants (Tt × Tt) gives TT, Tt, Tt and tt, which is 3 tall to 1 short.