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
[Solution from source] Cri-du-chat syndrome is due to deletion of part of the short arm (p arm) of chromosome 5, giving a cat-like cry in infants. Trisomy 21 causes Down syndrome. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.