Non Disjunction Aneuploidy

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

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

In hexaploid wheat, the haploid (n) ar basic (x) numbers of chromosomes are:

1. n=7 and x=21

2. n=21 and x=21

3. n=21 and x=14

4. n=21 and x=7

A disease caused by an autosomal primary non-disjunction is:

1. Klinefelter's Syndrome

2. Turner's Syndrome

3. Sickle Cell Anemia

4. Down's Syndrome

Which of the following statements are correct about Klinefelter's Syndrome?

A.	This disorder was first described by Langdon Down (1866).
B.	Such an individual has overall masculine development. However, the feminine development is also expressed.
C.	The affected individual is short statured.
D.	Physical, psychomotor and mental development is retarded.
E.	Such individuals are sterile.

Choose the correct answer from the options given below:

1.	A and E only	2.	A and B only
3.	C and D only	4.	B and E only

Broad palm with single palm crease is visible in a person suffering from-

1.	Thalassemia	2.	Down's syndrome
3.	Turner's syndrome	4.	Klinefelter's syndrome