Question

When dividing cells are examined under a light microscope, chromosomes first become vi:
(a) Interphase
(b) The S Phase (c) Prophase
(d) G
The structures that line up the chromosomes on the equatorial plate during metaphace​

Answer 1

Answer:

a) Interphase

A typical cell prepares itself for cell division right from the S-phase of interphase (G1 being the ‘resting phase’ of interphase while it attends to its other duties). The whole set of DNA is bundled up into diffuse chromatin which is found dispersed throughout the nucleus during the resting phase. But as the cell enters S-phase, the diffuse chromatin starts to condense into a compact and extensively folded form and gets segregated into chromosomes. Although strictly not defined, a cell is said to have entered prophase when discrete chromosomes appear in light microscopy. Prophase also is the time when two sister chromatids appear.

Answer 2

Answer:

metaphase

Explanation:

During this stage in human cells, the chromosomes then become visible under the microscope. As metaphase continues, the cells partition into the two daughter cells. Cells in metaphase are used in medical research to measure whether all of the chromosomes are present and whether or not they are all intact.