A) fertilization of on XX egg by a normal Y-bearin 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
Correct Answer: B
Solution :
Cri-du-chat syndrome is caused by a conspicuous deletion in the short arm of 5th chromosome. These individuals are severly impaired and their cat-like crying give the syndrome its name.
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