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4.Principles of Inheritance and Variation
medium
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
A
Dominant $X$-linked
B
Recessive $X$-linked
C
Dominant $Y$-linked
D
Recessive $Y$-linked
Solution
The disease in the given pedigree chart is $X$-linked dominant because, it is inherited by female child from her father and none of the male child is affected ($X$-linked). As disease expressed in female inspite of two $XX$-chromosomes, it will be dominant.
Standard 12
Biology
