A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that his cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in

(1) polyploidy

(2) somaclonal variation

(3) polyteny

(4) aneuploidy

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 81%
NEET - 2016
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Hints

Spindle fibres attach on to 

1. Kinetochore of the chromosome

2. centromere of the chromosome

3. Kinetosome of the chromosome

4. telomere of the chormosome 

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 94%
From NCERT
NEET - 2016
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In meiosis crossing over is initiated at 

1. leptotene

2. Zygotene

3. diplotene

4. pachytene

Subtopic:  Cell Cycle: Meiosis I |
 79%
From NCERT
NEET - 2016
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During cell growth, DNA synthesis takes place in

(1) S-phase                       

(2) G1-phase

(3) G2-phase                     

(4) M-phase 

Subtopic:  Intro to Cell Cycle & Interphase |
 91%
From NCERT
NEET - 2016
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DNA replication in bacteria occurs

(1) during S-phase

(2) within nucleolus

(3) prior to fission 

(4) just before transcription 

Subtopic:  Intro to Cell Cycle & Interphase |
NEET - 2017
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During cell growth, DNA synthesis takes place in:

1. S-phase

2. G1-phase

3. G2 -phase

4. M-phase

Subtopic:  Intro to Cell Cycle & Interphase |
 94%
From NCERT
NEET - 2016
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The stage during which separation of the paired homologous chromosomes begins is:

1. Pachytene 2. Diplotene
3. Diakinesis 4. Zygotene
Subtopic:  Cell Cycle: Meiosis I |
 63%
From NCERT
NEET - 2018
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Which of the following options gives the correct sequence of events during mitosis?

1. Condensation, nuclear membrane disassembly, arrangement at the equator, centromere division, segregation, telophase
2. Condensation, crossing over, nuclear membrane disassembly, segregation, telophase
3. Condensation, centromere division, segregation, arrangement at the equator, telophase
4. Condensation, nuclear membrane disassembly, crossing over, segregation, telophase

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 76%
From NCERT
NEET - 2017
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When a cell has stalled DNA replication fork, which checkpoint should be predominantly activated?

1. G1/S

2. G2 /M

3. M

4. Both G2/M and M

Subtopic:  Intro to Cell Cycle & Interphase |
NEET - 2016
Please attempt this question first.
Hints

Match the stages of meiosis in Column I to their characteristic features in Column II and select the correct option using the codes given below:
Column I Column II
(a) pachytene (1) pairing of homologous chromosomes
(b) metaphase - 1 (2) terminalisation of chiasmata
(c) diakinesis (3) crossing-over takes place
(d) zygotene (4) chromosomes align at equatorial plate
1.  a-3 b-4 c-2 d-1
2.  a-1 b-4 c-2 d-3
3.  a-2 b-4 c-3 d-1
4.  a-4 b-3 c-2 d-1
Subtopic:  Cell Cycle: Meiosis I |
 89%
From NCERT
NEET - 2016
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