What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?
(1) 21
(2) 42
(3) 63
(4) 84
Root tip is diploid (2n). Hence, the number of chromosomes in gametes (n) = 21. Aleurone cells are triploid, so the number of chromosomes in aleurone cells = 3n = 63.
Hence, the correct option is (3).
