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Which is correct?

1. Gametes are invariably haploid
2. Spores are invariably haploid
3. Gametes are generally haploid
4. Both spores and gametes are invariably haploid

Correct answer: Gametes are generally haploid

Solution

Gametes are usually haploid because they are typically formed by meiosis and fuse at fertilization. However, there are exceptions in some organisms, so “invariably” is too absolute; “generally haploid” is the safest correct statement.

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