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WAEC Biology 2024 Question 43

Question 43

Mendelian Inheritance

The diagram below is an illustration of the genetic cross between two parents. The parental gametes I, II, III and IV gave rise to the offspring below. Gametes I, II, III and IV, respectively are

Diagram for this question
  1. A.T, T, T and t.
  2. B.T, t, t and t.
  3. C.T, T, t and t.
  4. D.T, t, T and t.
Show the answer and explanation

Answer: B (T, t, t and t.)

Explanation

I and III give Tt while II and III give tt, so III is t, I is T and II is t. I and IV give Tt, so IV is also t.