Question detail
Which option gives the correct cause-and-effect relationship for Reproduction, Meiosis: students must explain how fertilisation restores the full number of chromosomes.
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 fertilisation restores the full number of chromosomes.
- 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 fertilisation restores the full number of chromosomes.
- 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 fertilisation restores the full number of chromosomes.. 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 fertilisation restores the full number of chromosomes.. 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 fertilisation restores the full number of chromosomes. 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 fertilisation restores the full number of chromosomes, 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
Assuming fertilisation adds chromosomes
Students often think fertilisation simply adds another set of chromosomes to the zygote, as if the gametes each contribute a full set rather than halved sets.
Explain that each gamete already contains half the chromosome number; fertilisation joins one haploid set from the sperm with one from the egg to restore the diploid number, not add a full set to an existing diploid cell.
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