Waec Model Questions Vol1 2025 Biology Question 15
Practice objective / multiple choice question 15 from the 2025 Waec Model Questions Vol1 Biology examination.
In a plant species two traits are studied: flower colour (R = red dominant, r = white recessive) and plant height (T = tall dominant, t = dwarf recessive). A true‑breeding red‑tall plant (RR TT) is crossed with a white‑dwarf plant (rr tt) to produce F₁. Two F₁ individuals are then crossed to obtain F₂. Among 200 F₂ offspring the observed numbers are: 48 white‑dwarf, 52 white‑tall, 68 red‑dwarf and the remainder red‑tall. Using a chi‑square test at the 5 % significance level, determine whether the observed phenotypic distribution fits the expected 9:3:3:1 ratio.
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This is Waec Model Questions Vol1 2025 Biology Question 15. It is one of the objective questions from the 2025 Waec Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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