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