Q. 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
Explanation

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.

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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