- 1(current)
Q. No.Down's syndrome in humans is due to:
1. Three 'X' chromosomes
2. Three copies of chromosome 21
3. Monosomy
4. Two 'Y' chromosomes
1. Three 'X' chromosomes
2. Three copies of chromosome 21
3. Monosomy
4. Two 'Y' chromosomes
Subtopic: Â Non - Disjunction & Aneuploidy |
 88%
From NCERT
NEET - 2013
Please attempt this question first.
Hints
Please attempt this question first.
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
Subtopic: Â Non - Disjunction & Aneuploidy |
AIPMT - 2007
Please attempt this question first.
Hints
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 |
Subtopic: Â Non - Disjunction & Aneuploidy |
 63%
AIPMT - 2006
Please attempt this question first.
Hints
- 1(current)
Q. No.
© 2024 GoodEd Technologies Pvt. Ltd.