- 1(current)
Q. No.An abnormal human baby with 'XXX' sex chromosomes was born due to:
1. formation of abnormal ova in the mother
2. fusion of two ova and one sperm
3. fusion of two sperms and one ovum
4. formation of abnormal sperms in the father
Subtopic: Â Non - Disjunction & Aneuploidy |
 58%
NEET - 2015
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NEET 2026 - Target Batch - Vital
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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 |
 89%
From NCERT
NEET - 2013
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
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
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NEET 2026 - Target Batch - Vital
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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 |
 60%
AIPMT - 2006
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NEET 2026 - Target Batch - Vital
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- 1(current)
Q. No.
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