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Principles of Inheritance and Variation question

2002 · Q69
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Principles of Inheritance and Variation question

2002 · Q69

NEETBiologyPrinciples of Inheritance and VariationMCQ+4 / −1
Which of the following is a correct match -
  1. A
    Sickel cell anaemia = X – Chromosome
  2. B
    Down Syndrome = 21st Chromosome
  3. C
    Haemophilia = Y – Chromosome
  4. D
    Parkinson Disease = X & Y Chromosome
View written solutionFree

Correct answer: B

Down’s syndrome (Mongolian Idiocy, Mongolism) is caused by the presence of an extra chromosome number 21. Sickle cell anaemia is not a sex linked (i.e., X linked) disease but an autosomally inherited recessive trait.
Haemophilia is X-linked but not holandric/Y-linked. Parkinson’s disease is a degenerative disease. It is not at all hereditary.

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