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Which of the following processes is associated with a change in the cellular DNA amount?

1. Spore germination
2. Cytokinesis
3. Fertilisation
4. Blastulation

Correct answer: Fertilisation

Solution

Fertilisation changes the DNA amount in the resulting cell because two haploid gametes fuse to form a diploid zygote. The other options mainly involve cell division or developmental changes without altering the total DNA content per cell in that way.

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