WAEC Biology 2012 Objective — Question 57
Question 57 of 60 from the West African Examinations Council (WAEC) Biology 2012 Objective paper, with the correct answer and a full explanation.
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Two yellow-flowered hybrid plants each carrying a recessive factor for flowers with green colour were crossed. Which of the following ratios shows the correct proportion of offspring that have green flowers?
- A. 2 in 2
- B. 1 in 4Correct
- C. 1 in 3
- D. 1 in 5
Explanation
The correct proportion of offspring with the recessive (green) phenotype in a heterozygote x heterozygote cross is 1 in 4.
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