Multiple choice

In a practical exam of botany the students were asked to count the chromosomes in the root tips of onion. In which of the following stages can the chromosomes be most conveniently counted?

  1. Diakinesis

  2. Metaphase

  3. Prophase

  4. Anaphase

  5. Telophase

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Metaphase is the best time to count and study the number and morphology of chromosomes. The distinctly visible chromosomes arrange themselves at the equatorial or metaphasic plate. The centromeres lie at the equational plate while the limit are placed variously according to their size and spiral arrangement.