Question

what are chromosomes? Explain who is sexually reproducing organism the number of chromosomes in the pragnency is maintained?

Answer 1

Chromosomes are thread-like structures in which DNA is tightly packaged within the nucleus. DNA is coiled around proteins called histones, which provide the structural support. Chromosomes help ensure that DNA is replicated and distributed appropriately during cell division. Each chromosome has a centromere, which divides the chromosome into two sections – the p (short) arm and the q (long) arm. The centromere is located at the cell’s constriction point, which may or may not be the center of the chromosome.

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