Question

When does each of the following occur in mitosis?
i. the nuclear membrane dissolves
ii. the chromosomes are arranged in equator of the cell
iii. centromere divides into two
iv. sister chromatids become V shaped or J shaped

Answer 1

Answer:

I)Prophase

ii)Metaphase

iii)Anaphase

iv)Anaphase

Explanation:

i) since in prophase all the organalles, nuclear envelope, etc disappear at this stage.

ii) in metaphase chromosomes arrange themselves at the equator and form a metaphasic plate.

iii) in Anaphase,the spindle fibres attach to the kinetochore of the chromosomes and when they shorten, the centromere splits.

iv) in Anaphase, when the centromere splits, we are best able to observe the shape of the chromosomes, wether they are j shaped, L shaped, I shaped, or V shaped.

Hope the answer helps you!