Humans Normally Have ______ Number Of Pairs Of Autosomes.

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Question

Download Solution PDFHumans normally have ______ number of pairs of autosomes. This question was previously asked in SSC GD Previous Paper 34 (Held On: 11 March 2019 Shift 1)_English Download PDF Attempt Online View all SSC GD Constable Papers >
  1. 10
  2. 21
  3. 20
  4. 22

Answer (Detailed Solution Below)

Option 4 : 22 Crack SSC GD 2025 with India's Super Teachers FREE Demo Classes Available* Explore Supercoaching For FREE Free Tests View all Free tests > Free CRPF Constable (Technical & Tradesmen) Full Mock Test 97.4 K Users 100 Questions 100 Marks 120 Mins Start Now

Detailed Solution

Download Solution PDF

The correct answer is 22.

Key Points

  • Humans normally have 22 pairs of autosomes.
  • An autosome is any of the numbered chromosomes, as opposed to the sex chromosomes.
  • All the chromosomes other than the sex hormones are autosomes.
    • Chromosomes is a thread-like structure found in the nucleus.
    • It becomes visible during cell division.
    • In Humans, there are 23 pairs of chromosomes in total (46 chromosomes)
  • 22 pairs of autosomes (total 44) and one pair of allosomes.
  • An allosome is a sex chromosome that differs in size, form, and behaviour from an autosome.

Confusion Points

  • We actually have a total of 23 pairs of chromosomes in these cells, for a total of 46 chromosomes, but two of those are referred to by letter rather than by number and are called sex chromosomes rather than autosomes since they--that is the X and Y chromosome--help determine what sex, or gender, we are.

Additional Information

  • Humans have one pair of allosomes.
  • X and Y are the one pair of sex chromosomes.
  • These chromosomes contain genes that determine the biological sex of an organism.
  • In the XY sex-determination system, the female-provided ovum contributes an X chromosome.
  • The male-provided sperm contributes either an X chromosome or a Y chromosome.
  • Thus resulting in female (XX) or male (XY) offspring, respectively.
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