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  4. Given below is a pedigree chart showing the in-heritance of a certain sex-linked trait in humans. <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/b-00mqmhpkf9jk.png /> The trait traced in the above pedigree chart is

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Q. Given below is a pedigree chart showing the in-heritance of a certain sex-linked trait in humans.
Question
The trait traced in the above pedigree chart is

NTA AbhyasNTA Abhyas 2020Principles of Inheritance and Variation

Solution:

The genes for such traits are recessive and located on the X-chromosome. The x-linked recessive character appear more frequently in male and male always receive x-chromosome from her mother.
Example:
  • Colour Blindness
  • Haemophilia
  • Night Blindness
  • Glucose-6-p-dehydrogenase