WAEC Biology 2018 Objective — Question 42
Question 42 of 50 from the West African Examinations Council (WAEC) Biology 2018 Objective paper, with the correct answer and a full explanation.
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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 parent mouse is heterozygous for coat colour?
- A. M
- B. J
- C. K
- D. LCorrect
Explanation
Since black is dominant over white, for the cross to produce some white and some black mice among the offspring, parent L must be heterozygous (carrying both alleles).
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