Post-UTME Biology 2012 Objective — Question 14
Question 14 of 19 from the Post-UTME Screening (Post-UTME) Biology 2012 Objective paper, with the correct answer and a full explanation.
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Which of the following represents the phenotypic ratio when a plant Rr is crossed with another plant Rr, assuming that the gene R for round seed is dominant and wrinkled r is recessive?
- A. 1:2:1
- B. 2:2:1
- C. 3:2
- D. 3:1Correct
Explanation
A monohybrid cross Rr x Rr gives a 3:1 phenotypic ratio (round:wrinkled).
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