Question detail
Which option gives the correct cause-and-effect relationship for Reproduction, Meiosis: students must explain how meiosis halves the number of chromosomes in gametes.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reproduction
Question
- A. Correct cause and effect: A gene is the functional coding section; a chromosome is the larger DNA package. This matches Meiosis because students must explain how meiosis halves the number of chromosomes in gametes.
- B. Reversed cause: Saying a chromosome codes for one protein instead of identifying a gene. This would blur Genes vs chromosomes instead of testing Meiosis.
- C. Missing link: Using gene and chromosome as the same scale of structure. This misses the objective focus on explain how meiosis halves the number of chromosomes in gametes.
- D. Different process: It moves into a neighbouring Unit 4.6 idea rather than Reproduction / Meiosis.
Answer
The correct option is Correct cause and effect: A gene is the functional coding section; a chromosome is the larger DNA package. This matches Meiosis because students must explain how meiosis halves the number of chromosomes in gametes.. It is the only option that keeps Genes vs chromosomes separate and answers the approved learning objective in Meiosis.
Explanation
The correct option is Correct cause and effect: A gene is the functional coding section; a chromosome is the larger DNA package. This matches Meiosis because students must explain how meiosis halves the number of chromosomes in gametes.. Correct cause and effect: A gene is the functional coding section; a chromosome is the larger DNA package. This matches Meiosis because students must explain how meiosis halves the number of chromosomes in gametes. is correct because A gene is the functional coding section; a chromosome is the larger DNA package. The learning objective says students must explain how meiosis halves the number of chromosomes in gametes, so the answer must stay inside Meiosis. The alternative options are wrong because they either saying a chromosome codes for one protein instead of identifying a gene., using gene and chromosome as the same scale of structure., or drift away from question stems about genes must test coding sections, alleles, or inherited characteristics..
Common mistake
Misunderstanding the role of meiosis in chromosome reduction
Students often think that chromosome number is halved during the first meiotic division (Meiosis I) and then stays the same, or they believe that the reduction happens during fertilisation.
Clarify that meiosis consists of two consecutive divisions: Meiosis I separates homologous chromosomes, reducing the chromosome number by half, and Meiosis II separates sister chromatids. The resulting gametes each contain one set of chromosomes, and fertilisation simply restores the diploid number by combining two haploid sets.
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