How many sets of chromosomes are found in a human somatic cell?

In each somatic cell, there are 23 homologous chromosomes.

What are chromosomes?

Chromosomes are thread-like structures in which DNA is tightly packaged within the nucleus.

  • DNA is coiled around proteins called histones, which provide 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.
  • In humans, 46 chromosomes are arranged in 23 pairs, including 22 pairs of chromosomes called autosomes.
  • Autosomes are labelled 1-22 for reference.
  • Each chromosome pair consists of one chromosome inherited from the mother and one from the father.

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