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Which option gives the correct cause-and-effect relationship for Variation and evolution, Variation: students must describe how the genome and interaction with the environment influence phenotype.
- A.Correct cause and effect: Mitosis maintains chromosome number; meiosis halves chromosome number. This matches Variation because students must describe how the genome and interaction with the environment influence phenotype.
- B.Reversed cause: Claiming meiosis is used for body growth. This would blur Mitosis vs meiosis instead of testing Variation.
- C.Missing link: Claiming mitosis produces gametes. This misses the objective focus on describe how the genome and interaction with the environment influence phenotype.
- D.Different process: It moves into a neighbouring Unit 4.6 idea rather than Variation and evolution / Variation.
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