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What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells?

1. 42
2. 63
3. 84
4. 21

Correct answer: 63

Solution

Root tip cells are somatic and therefore diploid, so 42 chromosomes means 2n = 42. Aleurone cells are part of the endosperm tissue in flowering plants and are typically triploid (3n), so they have 63 chromosomes.

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