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Question

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


A

63

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B

84

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C

21

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D

42

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Solution

The correct option is A

63


The outermost cell layer of the endosperm (3n) of seed is called aleurone layer. Since, the cells of aleurone layer are triploid, the number of chromosomes would be 21×3=63, as root tip cells(2n) has 21×2=42 chromosomes, as n = 21.


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