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

Home » Advanced Botany » Principles of Inheritance and Variation » Question

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

1. loss of half of the short arm of chromosome 5
2. loss of half of the long arm of chromosome 5
3. trisomy of 21st chromosome
4. fertilization of an XX egg by a normal Y-bearing sperm

Correct Option: A

Cri-du-chat syndrome in humans caused by the partial deletion of the short arm of chromosome no. 5. In this child has abnormalities in his/her facial expressions, mental retardation, they speak and cry like that of cat, heart does not work properly.