In meiosis crossing over is initiated at?
1. leptotene
2. zygotene
3. diplotene
4. pachytene

Subtopic:  Cell Cycle: Meiosis I |
 83%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Spindle fibres attach on to?
1. kinetochore of the chromosome
2. centromere of the chromosome
3. kinetosome of the chromosome
4. telomere of the chromosome
Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 94%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following is not a characteristic feature during mitosis cells?
1. Disappearance of nucleolus 2. Chromosome movement
3. Synapsis 4. Spindle fibres
Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 88%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Anaphase Promoting Complex (APC) is protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?

1. Chromosomes will be fragmented

2. Chromosomes will not segregate

3. Recombination of chromosome arms will occur

4. Chromosomes will not condense

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 82%
NEET - 2017
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
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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

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
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh