Neco Model Questions Vol1 2024 Biology Question 17

Practice objective / multiple choice question 17 from the 2024 Neco Model Questions Vol1 Biology examination.

Neco Model Questions Vol1 2024 Biology Objective / Multiple Choice Medium Difficulty
Question 17 NECO_MODEL_QUESTIONS_VOL1 • 2024 • BIOLOGY • objective

Two genes, A/a and B/b, are located on the same chromosome and are linked with a recombination frequency of 12 %. A plant heterozygous in coupling phase (genotype AB/ab) is crossed with a homozygous recessive plant (ab/ab). (a) What proportion of the offspring are expected to display recombinant phenotypes (Ab or aB)? (b) If 250 offspring are produced, what is the expected number of recombinant offspring? (c) In an actual experiment 40 recombinant offspring are observed. Using a chi‑square test with 1 degree of freedom, calculate the chi‑square value and state whether the deviation from the expected number is significant at the 5 % level.

Answer Options

A. Proportion 0.10; expected number 25; chi‑square ≈ 5.33; significant at 5 % level
B. Proportion 0.12; expected number 30; chi‑square ≈ 6.00; significant at 5 % level
C. Proportion 0.15; expected number 38; chi‑square ≈ 2.10; not significant at 5 % level
Correct Answer D. Proportion 0.12; expected number 30; chi‑square ≈ 3.79; not significant at 5 % level
Correct Answer
D
Correct Option:
Proportion 0.12; expected number 30; chi‑square ≈ 3.79; not significant at 5 % level

About This Question

This is Neco Model Questions Vol1 2024 Biology Question 17. It is one of the objective questions from the 2024 Neco Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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