Question

Cri - du -chat Syndrome in humans is caused by the

(A) trisomy of 21st chromosome 

 (B) Fertilization of an XX egg by a normal Y - bearing sperm  

(C) loss of half of the short arm of chromosome 5 

(D) loss of half of the long arm of chromosome 5

Answer 1

(C) loss of half of the short arm of chromosome 5