Regarding Meiosis, which of the statements is incorrect?

NEET-2022 [Cell-Cycle-and-Cell-Division] [class-xi ]

• DNA replication occurs in S phase of Meiosis-II
• Pairing of homologous chromosomes and recombination occurs in Meiosis-I
• Four haploid cells are formed at the end of Meiosis-II
• There are two stages in Meiosis, Meiosis-I and II
Correct Option: A  [ DNA replication occurs in S phase of Meiosis-II ]

Remark:

Which of the following stages of meiosis involves division of centromere?

NEET-2021 [Cell-Cycle-and-Cell-Division] [class-xi ]

• Metaphase I
• Metaphase II
• Anaphase II
• Telophase II
Correct Option: C  [ Anaphase II ]

Remark:

Match List-I with List-II.

NEET-2021 [Cell-Cycle-and-Cell-Division] [class-xi ]

• A-IV, B-II, C-III, D-I,
• A-IV, B-I, C-II, D-III,
• A-II, B-IV, C-III, D-I,
• A-III, B-II, C-I, D-IV,
Correct Option: B  [ A-IV, B-I, C-II, D-III, ]

Remark:

The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G₁ phase is 8, what would be the number of chromosomes after S phase?

NEET-2021 [Cell-Cycle-and-Cell-Division] [class-xi ]

• 8
• 16
• 4
• 32
Correct Option: A  [ 8 ]

Remark:

Which stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature?

NEET-2021 [Cell-Cycle-and-Cell-Division] [class-xi ]

• Leptotene
• Zygotene
• Diakinesis
• Pachytene
Correct Option: C  [ Diakinesis ]

Remark:

The centriole undergoes duplication during:

NEET-2021 [Cell-Cycle-and-Cell-Division] [class-xi ]

• S-phase
• Prophase
• Metaphase
• G₂ phase
Correct Option: A  [ S-phase ]

Remark:

Attachment of spindle fibers to kinetochores of chromosomes becomes evident in:

NEET-(Oct)2020 [Cell-Cycle-and-Cell-Division] [class-xi ]

• Anaphase
• Telophase
• Prophase
• Metaphase
Correct Option: D  [ Metaphase ]

Remark:

In a mitotic cycle, the correct sequence of phases is:

NEET-(Oct)2020 [Cell-Cycle-and-Cell-Division] [class-xi ]

• S, G₁, G₂, M
• G₁, S, G₂, M
• M, G₁, G₂, S
• G₁, G₂, S, M
Correct Option: B  [ G₁, S, G₂, M ]

Remark:

Match the following events that occur in their respective phases of cell cycle and select the correct option:

NEET-(Oct)2020 [Cell-Cycle-and-Cell-Division] [class-xi ]

• (A)-(II), (B)-(III), (C)-(IV), (D)-(I)
• (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
• (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
• (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
Correct Option: D  [ (A)-(I), (B)-(II), (C)-(III), (D)-(IV) ]

Remark:

During Meiosis 1, in which stage synapsis takes place?

NEET-(Oct)2020 [Cell-Cycle-and-Cell-Division] [class-xi ]

• Pachytene
• Zygotene
• Diplotene
• Leptotene
Correct Option: B  [ Zygotene ]

Remark: