Question

Mongolian idiots are due to trisomy in 21${}^{st}$ chromosome is called as

• A. Down's syndrome
• B. Turner's syndrome
• C. Kleinfelter's syndrome
• D. Triplex syndrome

Answer 1

The correct option is A Down's syndrome

Trisomy mainly exists due to one extra copy of chromosome which is caused due to certain mutation or by non-disjunction of homologous chromosomes during cell division. The term Mongolian idiocy have been used to refer to a specific type of mental deficiency associated with the genetic disorder, more commonly referred to as Down syndrome.
Therefore, the correct answer is option A.