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Question
If the endosperm cell of an angiosperm contains 24 chromosomes, the number of chromosomes in the root tip cells will be ______.
Options
8
16
24
32
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Solution
If the endosperm cell of an angiosperm contains 24 chromosomes, the number of chromosomes in the root tip cells will be 16.
Explanation:
The endosperm in angiosperms is usually triploid (3n), formed by the fusion of one male gamete (n) with two polar nuclei (each n), making its chromosome number three times the haploid number (n). Given the endosperm has 24 chromosomes, 24 = 3n, so n = 8. The root tip cells belong to the diploid sporophyte (2n), so the number of chromosomes = 2 × 8 = 16.
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