How many chromosomes are drawn in each part of figure 12.5? (Ignore the micrograph in step2.)

The thread-like structure present within the nucleus is known as a chromosome. It is made of DNA and a protein. The chromosome transfer occurs from the parent to the offspring after the process of cell division.

Duplication is the process in which extrachromosomal copies are produced. It takes place at a point when the existing cells cleave to form the daughter cells.

The cell division has different phases: interphase, prophase, metaphase, anaphase, telophase, and cytokinesis. Interphase is the phase that undergoes the cleavage of chromosomes to make the chromosomes for the further steps of the cell division process.

A single chromosome is given in the first step. The next step is in which the chromosomes undergo a duplication process to create the sister chromatid. The two segments are seen in the image, which represents one chromosome.

The third step shows the separation of the two sister chromatids to form two separate chromosomes. These two chromosomes are shifted to the new cells that are formed from the existing cells.

Hence, the number of chromosomes produced in figure 12.5 is 1,1, and 2.