Principles of Inheritance and Variation Question 180
180. Which of the following is correct match?
[2002]
(a) Down’s syndrome -21 st chromosome
(b) Sickle cell anaemia - $X$-chromosome
(c) Haemophila - $Y$-chromosome
(d) Parkinson disease $-X$ & $Y$ chromosome
Show Answer
Answer : a
Hints & Solution
(a) Sickle cell anaemia is a genetic disorder caused by a defective allele on chromosome 11 . Hemophilia is a sex linked recessive disorder. Down’s syndrome is caused by trisomy of the $21^{\text{st }}$ chromosome.
