Waec Model Questions Vol1 2021 Biology Question 5
Practice objective / multiple choice question 5 from the 2021 Waec Model Questions Vol1 Biology examination.
In a plant species flower colour is controlled by a single X‑linked gene with two alleles: R (red, dominant) and r (white, recessive). Females are XX and males are XY. A red‑flowered male (genotype X^R Y) is crossed with a red‑flowered female who is a carrier (heterozygous, genotype X^R X^r). What is the expected phenotypic ratio of red to white flowers among the progeny?
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This is Waec Model Questions Vol1 2021 Biology Question 5. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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