05. Phase of Meiosis and its Significance
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Cell cycle and Cell Division

230991 Which of the following is/are characteristic feature (s) of meiosis?
I. Number of choromosomes gets halved.
II. Crossing over takes place between non- homologous chromosomes, resulting in variation.
III. Helps in development of zygote into emboryo.
IV. It occurs in reproductive cells only.

1 I and IV
2 I, II and IV
3 II, III and IV
4 All of these
5 None of the above
[CMC Vellore-2015]
Cell cycle and Cell Division

230996 Assertion (A) : Events in pachytene play a key role in evolutionary changes in organisms.
Reason (R) : Exchange of genetic material takes place between sister chromatids of homologous chromosomes.

1 Both (A) and (R) are true and (R) is the correct explanation of \((\mathrm{A})\)
2 Both (A) and (R) are true and (R) is not the correct explanation of \((\mathrm{A})\)
3 (A) is true but (R) is false
4 (A) is false but (R) is true
[AP EAMCET-2015]
Cell cycle and Cell Division

231003 Match the sub-stage of prophase \(I\) of meiosis in Column I and the events in Column II and choose the right option.
| | Column I | | Column II |
| :--- | :--- | :--- | :--- |
| (A) | Leptotene | (1) | Terminalization of
chiasma |
| (B) | Zygotene | (2) | Crossing over and
recombination |
| (C) | Pachytene | (3) | Synapsis |
| (D) | Diakinesis | (4) | Visibility of
chromosomes |

1 \(\mathrm{A}-1 \quad \mathrm{~B}-2\) \(\mathrm{~C}-3 \quad \mathrm{~D}-4\)
2 \(\mathrm{A}-1 \quad \mathrm{~B}-3\) \(\mathrm{~C}-2 \quad \mathrm{~D}-4\)
3 \(\mathrm{A}-4 \quad \mathrm{~B}-3\) \(\mathrm{~C}-2 \quad \mathrm{~D}-1\)
4 \(\mathrm{A}-4 \quad \mathrm{~B}-1\) \(\mathrm{~C}-2 \quad \mathrm{~D}-3\)
5 \(\mathrm{A}-4 \quad \mathrm{~B}-2\) \(\mathrm{~C}-3 \quad \mathrm{~D}-1\)
Cell cycle and Cell Division

230929 The correct sequence of events in prophase \(I\) is

1 Synapsis \(\rightarrow\) Crossing over \(\rightarrow\) Chiasmata \(\rightarrow\) Terminalisation
2 Crossing over \(\rightarrow\) Synapsis \(\rightarrow\) Chiasmata \(\rightarrow\) Terminalisation
3 Chiasmata \(\rightarrow\) Synapsis \(\rightarrow\) Crossing over \(\rightarrow\) Terminalisation
4 Chiasmata \(\rightarrow\) Crossing over \(\rightarrow\) Synapsis \(\rightarrow\) Terminalisation
[Karnataka CET-2021]
Cell cycle and Cell Division

230930 Identify the correct sequence of the following sub-phase of prophase \(I\).
(I) Zygotene
(II) Diplotene
(III) Leptotene
(IV) Pachytene
(V) Diakinesis

1 I, II, III, IV, V
2 I, II, III, V, IV
3 III, I, IV, II, V
4 III, I, IV, V, II
[TS EAMCET-29.09.2020 Shift-II]
Join With Us for More Updates
Cell cycle and Cell Division

230991 Which of the following is/are characteristic feature (s) of meiosis?
I. Number of choromosomes gets halved.
II. Crossing over takes place between non- homologous chromosomes, resulting in variation.
III. Helps in development of zygote into emboryo.
IV. It occurs in reproductive cells only.

1 I and IV
2 I, II and IV
3 II, III and IV
4 All of these
5 None of the above
[CMC Vellore-2015]
Cell cycle and Cell Division

230996 Assertion (A) : Events in pachytene play a key role in evolutionary changes in organisms.
Reason (R) : Exchange of genetic material takes place between sister chromatids of homologous chromosomes.

1 Both (A) and (R) are true and (R) is the correct explanation of \((\mathrm{A})\)
2 Both (A) and (R) are true and (R) is not the correct explanation of \((\mathrm{A})\)
3 (A) is true but (R) is false
4 (A) is false but (R) is true
[AP EAMCET-2015]
Cell cycle and Cell Division

231003 Match the sub-stage of prophase \(I\) of meiosis in Column I and the events in Column II and choose the right option.
| | Column I | | Column II |
| :--- | :--- | :--- | :--- |
| (A) | Leptotene | (1) | Terminalization of
chiasma |
| (B) | Zygotene | (2) | Crossing over and
recombination |
| (C) | Pachytene | (3) | Synapsis |
| (D) | Diakinesis | (4) | Visibility of
chromosomes |

1 \(\mathrm{A}-1 \quad \mathrm{~B}-2\) \(\mathrm{~C}-3 \quad \mathrm{~D}-4\)
2 \(\mathrm{A}-1 \quad \mathrm{~B}-3\) \(\mathrm{~C}-2 \quad \mathrm{~D}-4\)
3 \(\mathrm{A}-4 \quad \mathrm{~B}-3\) \(\mathrm{~C}-2 \quad \mathrm{~D}-1\)
4 \(\mathrm{A}-4 \quad \mathrm{~B}-1\) \(\mathrm{~C}-2 \quad \mathrm{~D}-3\)
5 \(\mathrm{A}-4 \quad \mathrm{~B}-2\) \(\mathrm{~C}-3 \quad \mathrm{~D}-1\)
Cell cycle and Cell Division

230929 The correct sequence of events in prophase \(I\) is

1 Synapsis \(\rightarrow\) Crossing over \(\rightarrow\) Chiasmata \(\rightarrow\) Terminalisation
2 Crossing over \(\rightarrow\) Synapsis \(\rightarrow\) Chiasmata \(\rightarrow\) Terminalisation
3 Chiasmata \(\rightarrow\) Synapsis \(\rightarrow\) Crossing over \(\rightarrow\) Terminalisation
4 Chiasmata \(\rightarrow\) Crossing over \(\rightarrow\) Synapsis \(\rightarrow\) Terminalisation
[Karnataka CET-2021]
Cell cycle and Cell Division

230930 Identify the correct sequence of the following sub-phase of prophase \(I\).
(I) Zygotene
(II) Diplotene
(III) Leptotene
(IV) Pachytene
(V) Diakinesis

1 I, II, III, IV, V
2 I, II, III, V, IV
3 III, I, IV, II, V
4 III, I, IV, V, II
[TS EAMCET-29.09.2020 Shift-II]
For More Updates join with Us
Cell cycle and Cell Division

230991 Which of the following is/are characteristic feature (s) of meiosis?
I. Number of choromosomes gets halved.
II. Crossing over takes place between non- homologous chromosomes, resulting in variation.
III. Helps in development of zygote into emboryo.
IV. It occurs in reproductive cells only.

1 I and IV
2 I, II and IV
3 II, III and IV
4 All of these
5 None of the above
[CMC Vellore-2015]
Cell cycle and Cell Division

230996 Assertion (A) : Events in pachytene play a key role in evolutionary changes in organisms.
Reason (R) : Exchange of genetic material takes place between sister chromatids of homologous chromosomes.

1 Both (A) and (R) are true and (R) is the correct explanation of \((\mathrm{A})\)
2 Both (A) and (R) are true and (R) is not the correct explanation of \((\mathrm{A})\)
3 (A) is true but (R) is false
4 (A) is false but (R) is true
[AP EAMCET-2015]
Cell cycle and Cell Division

231003 Match the sub-stage of prophase \(I\) of meiosis in Column I and the events in Column II and choose the right option.
| | Column I | | Column II |
| :--- | :--- | :--- | :--- |
| (A) | Leptotene | (1) | Terminalization of
chiasma |
| (B) | Zygotene | (2) | Crossing over and
recombination |
| (C) | Pachytene | (3) | Synapsis |
| (D) | Diakinesis | (4) | Visibility of
chromosomes |

1 \(\mathrm{A}-1 \quad \mathrm{~B}-2\) \(\mathrm{~C}-3 \quad \mathrm{~D}-4\)
2 \(\mathrm{A}-1 \quad \mathrm{~B}-3\) \(\mathrm{~C}-2 \quad \mathrm{~D}-4\)
3 \(\mathrm{A}-4 \quad \mathrm{~B}-3\) \(\mathrm{~C}-2 \quad \mathrm{~D}-1\)
4 \(\mathrm{A}-4 \quad \mathrm{~B}-1\) \(\mathrm{~C}-2 \quad \mathrm{~D}-3\)
5 \(\mathrm{A}-4 \quad \mathrm{~B}-2\) \(\mathrm{~C}-3 \quad \mathrm{~D}-1\)
Cell cycle and Cell Division

230929 The correct sequence of events in prophase \(I\) is

1 Synapsis \(\rightarrow\) Crossing over \(\rightarrow\) Chiasmata \(\rightarrow\) Terminalisation
2 Crossing over \(\rightarrow\) Synapsis \(\rightarrow\) Chiasmata \(\rightarrow\) Terminalisation
3 Chiasmata \(\rightarrow\) Synapsis \(\rightarrow\) Crossing over \(\rightarrow\) Terminalisation
4 Chiasmata \(\rightarrow\) Crossing over \(\rightarrow\) Synapsis \(\rightarrow\) Terminalisation
[Karnataka CET-2021]
Cell cycle and Cell Division

230930 Identify the correct sequence of the following sub-phase of prophase \(I\).
(I) Zygotene
(II) Diplotene
(III) Leptotene
(IV) Pachytene
(V) Diakinesis

1 I, II, III, IV, V
2 I, II, III, V, IV
3 III, I, IV, II, V
4 III, I, IV, V, II
[TS EAMCET-29.09.2020 Shift-II]
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Cell cycle and Cell Division

230991 Which of the following is/are characteristic feature (s) of meiosis?
I. Number of choromosomes gets halved.
II. Crossing over takes place between non- homologous chromosomes, resulting in variation.
III. Helps in development of zygote into emboryo.
IV. It occurs in reproductive cells only.

1 I and IV
2 I, II and IV
3 II, III and IV
4 All of these
5 None of the above
[CMC Vellore-2015]
Cell cycle and Cell Division

230996 Assertion (A) : Events in pachytene play a key role in evolutionary changes in organisms.
Reason (R) : Exchange of genetic material takes place between sister chromatids of homologous chromosomes.

1 Both (A) and (R) are true and (R) is the correct explanation of \((\mathrm{A})\)
2 Both (A) and (R) are true and (R) is not the correct explanation of \((\mathrm{A})\)
3 (A) is true but (R) is false
4 (A) is false but (R) is true
[AP EAMCET-2015]
Cell cycle and Cell Division

231003 Match the sub-stage of prophase \(I\) of meiosis in Column I and the events in Column II and choose the right option.
| | Column I | | Column II |
| :--- | :--- | :--- | :--- |
| (A) | Leptotene | (1) | Terminalization of
chiasma |
| (B) | Zygotene | (2) | Crossing over and
recombination |
| (C) | Pachytene | (3) | Synapsis |
| (D) | Diakinesis | (4) | Visibility of
chromosomes |

1 \(\mathrm{A}-1 \quad \mathrm{~B}-2\) \(\mathrm{~C}-3 \quad \mathrm{~D}-4\)
2 \(\mathrm{A}-1 \quad \mathrm{~B}-3\) \(\mathrm{~C}-2 \quad \mathrm{~D}-4\)
3 \(\mathrm{A}-4 \quad \mathrm{~B}-3\) \(\mathrm{~C}-2 \quad \mathrm{~D}-1\)
4 \(\mathrm{A}-4 \quad \mathrm{~B}-1\) \(\mathrm{~C}-2 \quad \mathrm{~D}-3\)
5 \(\mathrm{A}-4 \quad \mathrm{~B}-2\) \(\mathrm{~C}-3 \quad \mathrm{~D}-1\)
Cell cycle and Cell Division

230929 The correct sequence of events in prophase \(I\) is

1 Synapsis \(\rightarrow\) Crossing over \(\rightarrow\) Chiasmata \(\rightarrow\) Terminalisation
2 Crossing over \(\rightarrow\) Synapsis \(\rightarrow\) Chiasmata \(\rightarrow\) Terminalisation
3 Chiasmata \(\rightarrow\) Synapsis \(\rightarrow\) Crossing over \(\rightarrow\) Terminalisation
4 Chiasmata \(\rightarrow\) Crossing over \(\rightarrow\) Synapsis \(\rightarrow\) Terminalisation
[Karnataka CET-2021]
Cell cycle and Cell Division

230930 Identify the correct sequence of the following sub-phase of prophase \(I\).
(I) Zygotene
(II) Diplotene
(III) Leptotene
(IV) Pachytene
(V) Diakinesis

1 I, II, III, IV, V
2 I, II, III, V, IV
3 III, I, IV, II, V
4 III, I, IV, V, II
[TS EAMCET-29.09.2020 Shift-II]
Join With Us for More Updates
Cell cycle and Cell Division

230991 Which of the following is/are characteristic feature (s) of meiosis?
I. Number of choromosomes gets halved.
II. Crossing over takes place between non- homologous chromosomes, resulting in variation.
III. Helps in development of zygote into emboryo.
IV. It occurs in reproductive cells only.

1 I and IV
2 I, II and IV
3 II, III and IV
4 All of these
5 None of the above
[CMC Vellore-2015]
Cell cycle and Cell Division

230996 Assertion (A) : Events in pachytene play a key role in evolutionary changes in organisms.
Reason (R) : Exchange of genetic material takes place between sister chromatids of homologous chromosomes.

1 Both (A) and (R) are true and (R) is the correct explanation of \((\mathrm{A})\)
2 Both (A) and (R) are true and (R) is not the correct explanation of \((\mathrm{A})\)
3 (A) is true but (R) is false
4 (A) is false but (R) is true
[AP EAMCET-2015]
Cell cycle and Cell Division

231003 Match the sub-stage of prophase \(I\) of meiosis in Column I and the events in Column II and choose the right option.
| | Column I | | Column II |
| :--- | :--- | :--- | :--- |
| (A) | Leptotene | (1) | Terminalization of
chiasma |
| (B) | Zygotene | (2) | Crossing over and
recombination |
| (C) | Pachytene | (3) | Synapsis |
| (D) | Diakinesis | (4) | Visibility of
chromosomes |

1 \(\mathrm{A}-1 \quad \mathrm{~B}-2\) \(\mathrm{~C}-3 \quad \mathrm{~D}-4\)
2 \(\mathrm{A}-1 \quad \mathrm{~B}-3\) \(\mathrm{~C}-2 \quad \mathrm{~D}-4\)
3 \(\mathrm{A}-4 \quad \mathrm{~B}-3\) \(\mathrm{~C}-2 \quad \mathrm{~D}-1\)
4 \(\mathrm{A}-4 \quad \mathrm{~B}-1\) \(\mathrm{~C}-2 \quad \mathrm{~D}-3\)
5 \(\mathrm{A}-4 \quad \mathrm{~B}-2\) \(\mathrm{~C}-3 \quad \mathrm{~D}-1\)
Cell cycle and Cell Division

230929 The correct sequence of events in prophase \(I\) is

1 Synapsis \(\rightarrow\) Crossing over \(\rightarrow\) Chiasmata \(\rightarrow\) Terminalisation
2 Crossing over \(\rightarrow\) Synapsis \(\rightarrow\) Chiasmata \(\rightarrow\) Terminalisation
3 Chiasmata \(\rightarrow\) Synapsis \(\rightarrow\) Crossing over \(\rightarrow\) Terminalisation
4 Chiasmata \(\rightarrow\) Crossing over \(\rightarrow\) Synapsis \(\rightarrow\) Terminalisation
[Karnataka CET-2021]
Cell cycle and Cell Division

230930 Identify the correct sequence of the following sub-phase of prophase \(I\).
(I) Zygotene
(II) Diplotene
(III) Leptotene
(IV) Pachytene
(V) Diakinesis

1 I, II, III, IV, V
2 I, II, III, V, IV
3 III, I, IV, II, V
4 III, I, IV, V, II
[TS EAMCET-29.09.2020 Shift-II]