Q. ‘Cri-du–chat’ syndrome in humans is caused by the
A) Fertilization of an XX egg by a normal Y-bearing sperm
B) Loss of half of the short arm of chromosome 5
C) Loss of half of the long arm of chromosome 5
D) Trisomy of 21st chromosome
Explanation
Cri-du–chat syndrome is caused by a conspiuous deletion in the short arm of 5th chromosome. These individuals asre severly impaired and their cat-like crying give the syndrome its name.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.