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Question: Answered & Verified by Expert
Given below is a pedigree chart showing the inheritance of a certain sex-linked trait in humans.


The trait traced in the above pedigree chart is
BiologyPrinciples of Inheritance and VariationAIIMSAIIMS 2005
Options:
  • A dominant X-linked
  • B recessive X-linked
  • C dominant Y-linked
  • D recessive Y-linked.
Solution:
1348 Upvotes Verified Answer
The correct answer is: dominant X-linked
In the given chart the disease is inherited by female child from his father and none of the male child is affected hence it shows that the disease is X linked. Moreover, in the progeny the disease is expressed phenotypically by female child even if it is carrier, so the disease is dominant. Hence the pattern of disease is $\mathrm{X}$ linked dominant.

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