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WAEC Biology 2018 Question 43

Question 43

Mendelian Inheritance

The diagrams below are illustrations of the inheritance of coat colour in mice. J, K, L, M and N are parents. The cross between two parent mice gave rise to offspring P, Q, R and S. Which of the offspring are all homozygous?

Diagram for this question
  1. A.P
  2. B.Q
  3. C.S
  4. D.R
Show the answer and explanation

Answer: C (S)

Explanation

White is recessive. M and N are both white (homozygous recessive), so all their young S are white and homozygous too.