If you are provided with root-tips of onion in your class and are asked to count the chromosomes. Which of…
If you are provided with root-tips of onion in your class and are asked to count the chromosomes. Which of the following stages can you most conveniently took into?
metaphase
telophase
anaphase
prophase.
Solution
Chromosomal morphology is best observed at metaphase. Metaphase is a stage of mitosis in the cell cycle in which chromosomes are at their most condensed and coiled stage.
Related Theory
In metaphase chromosomes line up at the metaphase plate, under tension from the mitotic spindle. The two sister chromatids of each chromosome are captured by microtubules from opposite spindle poles. In metaphase, the spindle has captured all the chromosomes and lined them up at the middle of the cell, ready to divide.