Principles of Inheritance and Variation Question 140
140. A disease caused by an autosomal primary non-disjunction is :
(a) Klinefelter’s Syndrome
(b) Turner’s Syndrome
(c) Sickel Cell Anemia
(d) Down’s Syndrome
Show Answer
Answer : d
Hints & Solution
(d) Down’s syndrome is caused by nondisjunction of $21^{\text{st }}$ chromosome i.e. Trisomy.
