Question

During replication of the DNA does the number of chromosomes remains the same.

Answer 1

In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

1. Each chromosome has two short arms (p arms), two longer arms (q arms), and a centromere holding it all together at the centre. It is like beads on a string, DNA is on chromosome.
2. During replication, DNA strands split and each strand make its replica (duplicate). During this process, only number of DNA strands will increase not the chrosome.
3. Image result for what is replication of DNA.