Answer :

Down’s syndrome is caused due to the presence of the additional copy of the 21st chromosome caused due to nondisjunction, i.e., the failure of separation of the sister chromatids during cell division. Therefore it is also called as the trisomy of 21. It is represented as 47, XX/XY.

Turner’s syndrome is caused due to the absence of one of the X chromosomes in females arising due to nondisjunction of X chromosomes during the ovum formation. It is represented as 45, XO.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses

A hemophilic fathBiology - Board Papers

Why is the frequeBiology - Exemplar

The pedigree charBiology - Exemplar

It is said, that Biology - Exemplar