Prophase

Q.

The longest phase of Meiosis I is ______________ and it has _____ subphases.

1. Metaphase I & 3.

2. Anaphase I & 4.

3. Interphase I & 2.

4. Prophase I & 5.

Q.

The number of (i) meiotic and (ii) mitotic divisions required for the development of 7-celled, 8-nucleate monosporic embryo sac are

1. (i) 1 & (ii) 3

2. (i) 2 & (ii) 3

3. (i) 1 & (ii) 7

4. (i) 4 & (ii) 3

Q.

Name the cell division that take place during gametogenesis and what is its significance

Q.

The term meiosis was given by_______.

1. Farmer and Moore

2. Knoll and Rusk

3. A.Flemming

4. Johannsen

Q. Explain what happens in prophase stage of mitosis.

Q.

The spindle formation takes place during the prophase stage.

1. True

2. False

Q. Which is the correct order of phases in the prophase 1?

1. Leptotene, Diakinesis, Pachytene, Diplotene, Zygotene
2. Leptotene, Zygotene, Pachytene, Diplotene, Diakinesis
3. Diakinesis, Diplotene, Pachytene, Leptotene, Zygotene.
4. Leptotene, pachytene, Zygotene, Diplotene, Diakinesis

Q.

The process of duplication of genetic material is observed in interphase (or early prophase). The particular or specific stage of the eukaryotic cell cycle during which this occurs is termed the -

1. G₂ or Gap Phase 2

2. G₀ or Dormant phase

3. G₁ or Gap Phase 1

4. S or Synthesis stage

Q.

___________ are DNA threads which appear inside the nucleus at the time of cell division.

1. Chromosomes

2. Spindle fibers

3. Centrioles

4. None of these

Q.

The process of duplication of chromosomes is observed in interphase (or early prophase). The particular stage of the eukaryotic cell cycle during which this occurs is termed the -

1. G₂ or Gap Phase 2

2. S or Synthesis stage

3. G₁ or Gap Phase 1

4. G₀ or Dormant phase

Q.

Chromosomes become visible as fine long threads during

1. Metaphase

2. Telophase

3. Anaphase

4. Prophase

Q.

The given diagram shows a stage during mitotic division in an animal cell:

(i) Identify the stage. Give a reason to support your answer.

(ii) Draw a neat labelled diagram of the cell as it would appear in the next stage. name the stage.

(iii)In what two ways is mitotic division in an animal cell different from the mitotic division in a plant cell?

(iv)Name the type of cell division that occurs during:

A. Growth of shoot B.Formation of pollen grains.

Q. Explain : [4 MARKS]
1) G1 phase
2) S phase or Synthesis phase
3) G2 phase

Q. The following diagram represents stages in the second meiotic division. [5 MARKS]



(i) Label each phase correctly as Prophase II, Metaphase II, Anaphase II or Telophase II.
(ii) Arrange the stages in the correct sequence of development.
(iii) Make a series of sketches to show the phases of cell division in the meiotic division.

Q. Chromosome is most coiled at (in mitosis)
(a) telophase
(b) anaphase
(c) metaphase
(d) prophase

Q. Which of the following disappear during prophase?

1. Plasma membrane
2. Chromosomes
3. Nucleolus
4. Nuclear membrane

Q. The term, not related to mitosis is:

1. gametes
2. chromosomes
3. DNA replication
4. somatic cells

Q.

Colchicine is a chemical that stops chromatids from separating during mitosis.

Which phase will the cell reach and then stop dividing?

1. Anaphase

2. Prophase

3. Metaphase

4. Telophase

Q.

What happens to the nuclear envelope in telophase I?

Q. What are the changes that occur during S phase? [2 MARKS]

Q. A protein called p53 can keep cells from dividing. To prevent cell division, this protein most likely stops:

1. Osmosis
2. Mitosis
3. Amitosis
4. Mutation

Q. The following diagram represents stages in the second meiotic division. [5 MARKS]



(i) Label each phase correctly as Prophase II, Metaphase II, Anaphase II or Telophase II.
(ii) Arrange the stages in the correct sequence of development.
(iii) Make a series of sketches to show the phases of cell division in the meiotic division.

Q. What happens to chromatin during prophase and metaphase of mitosis?

Q.

Where does the Mitotic spindle checkpoint occur?

Q. Crossing over occurs during the pachytene stage of prophase in meiosis, however the chiasma are visible during

1. Diplotene
2. Leptotene
3. Pachytene
4. Zygotene

Q. What is meosis and metosis, differntiate between them?

Q.

Kinetochore assembles on the:

1. Centromere

2. All of these

3. Centriole

4. Cell centre

Q. Choose the correct answer from each of the four given options :
During which stage of mitosis does chromosome condensation start?

[1 Mark]

1. Prophase
2. Metaphase
3. Anaphase
4. Telophase

Q.

Give any instance that signifies the end of the prophase.

Q.

Match the following with the organs and the cells they produce through meiosis:

1. 1-b , 2-c , 3-a , 4-d

2. 1-c , 2-d , 3-b , 4-a

3. 1-c , 2-d , 3-a , 4-b

4. 1-d , 2-c , 3-b , 4-a