Anaphase

Q. The chromosomes start moving towards the opposite poles during ___________ of mitosis.

1. prophase
2. telophase
3. metaphase
4. anaphase

Q.

The period between two cell divisions is called

1. Interphase

2. Anaphase

3. G1 Phase
4. Prophase

Q. (a) What is karyokinesis? Name the four main phases that constitute karyokinesis.

(b) From the phases mentioned in (a) select the phase that is characterized by the following:
(i) The chromosomes arrange themselves upon the equator of the spindle.
(ii) The nucleoli and the nuclear membrane disappear.
(iii) The nucleolus reappears.
(iv) The sister chromatids undergo mutual repulsion and split longitudinally into two halves.
(v) The centrioles divide and move toward the poles.
(vi) Migration of the sister chromatids toward the poles is initiated. [5 MARKS]

Q.

Spindle fibres disappear in which stage of meiosis?

Q.

What is the plane of alignment of chromosomes at the metaphase called?

Q. At which stage of mitosis do chromatids separate and pass to different poles?

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

Q.

Early anaphase in mitosis is characterized by the:

1. Division of centromere in each chromosome

2. All of these

3. Separation of homologous chromosome

4. Contraction of continuous fibres

Q. During anaphase, __________ help in pulling the chromosomes to the opposite poles.

1. nucleolus
2. cell membrane
3. spindle fibres
4. centomere

Q.

Which of the following happens during Metaphase?

1. Chromatids are pulled to the opposite poles

2. Chromatids reach the opposite poles

3. Chromosomes align themselves along the equatorial plane

4. Spindle fibres are formed

Q. Which stages of cell division do the following figures A and B represent, respectively?

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

Q.

During which phase do the daughter cells get one chromosome of each homologous pair?

1. Anaphase II of Meiosis II

2. Anaphase of mitosis

3. Anaphase I of Meiosis I

4. Telophase

Q.

Which one of the following is the correct sequence of sub-stages in prophase - I of meiosis?

1. Leptotene — Diplotene — Zygotene — Diakinesis — Pachytene

2. Leptotene — Pachytene — Zygotene — Diplotene — Diakinesis

3. Leptotene — Zygotene — Pachytene — Diplotene — Diakinesis

4. Leptotene — Zygotene — Pachytene — Diakinesis — Diplotene

Q.

Match the stages of mitosis listed in column I with the important events pertaining to respective stages given under column II; and choose the answer which gives the correct combination of alphabets of the two columns:

$\begin{array}{cccc}& ColumnIStagesofmitosis& & ColumnIIImportantevents\\ A& \text{Interphase}& p& \text{Equatorial plate formation}\\ B& \text{Metaphase}& q& \text{Daughter chromosomes move to opposite poles}\\ C& \text{Anaphase}& r& \text{Centrioles divde}\\ & & s& \text{Synthetic phase}\end{array}$

1. A = s, B = p, C = q

2. A = r, B = s, C = p

3. A = s, B = q, C = p

4. A = s, B = r, C = p

Q.

Identify the stage of mitosis by inspecting the image and key changes listed.

Key changes:

* Splitting of centromere.

* Chromosomes move towards poles.

* Cell constriction appears.

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

Q.

Identify the stage of mitosis by inspecting the image and key changes listed.

Key changes:

* Splitting of centromere.

* Chromosomes move towards poles.

* Cell constriction appears.

Q. Which is not a characteristic of mitosis?

1. Leptotene
2. Zygotene
3. Pachytene
4. All of the above

Q.

Match the stages of mitosis listed in column I with the important events pertaining to respective stages given under column II; and choose the answer which gives the correct combination of alphabets of the two columns:

$\begin{array}{cccc}& \text{Column I Stages of mitosis}& & \text{Column II Important events}\\ \text{A}& \text{Interphase}& \text{p}& \text{Equatorial plate formation}\\ \text{B}& \text{Metaphase}& \text{q}& \text{Daughter chromosomes move to opposite poles}\\ \text{C}& \text{Anaphase}& \text{r}& \text{Centrioles divde}\\ & & \text{s}& \text{Synthetic phase}\end{array}$

1. A = s, B = r, C = p

2. A = r, B = s, C = p

3. A = s, B = q, C = p

4. A = s, B = p, C = q

Q.

The phase of the shortest duration is

1. Prophase

2. Metaphase

3. Anaphase

4. S-phase

Q.

What are monopolin?

Q. Identify the stage of mitosis by inspecting the image and key changes listed.

Key changes: 1.Splitting of chromatids.
2.Chromosomes move towards poles.
3.Cell constriction appears.

1. Prophase

2. Metaphase

3. Telophase

4. Anaphase

Q. What is the difference between anaphase of mitosis and anaphase of meiosis ?

Q.

Match the stages of mitosis listed in column I with the important events pertaining to respective stages given under column II; and choose the answer which gives the correct combination of alphabets of the two columns:

$\begin{array}{cccc}& ColumnIStagesofmitosis& & ColumnIIImportantevents\\ A& Interphase& p& Equatorialplateformation\\ B& Metaphase& q& Daughterchromosomesmovetooppositepoles\\ C& Anaphase& r& Centriolesdivde\\ & & s& Syntheticphase\end{array}$

1. A = s, B = p, C = q

2. A = s, B = r, C = p

3. A = r, B = s, C = p

4. A = s, B = q, C = p

Q.

Which stages of cell division do the following figures A and B represent, respectively?

1. Telophase and Metaphase

2. Late Anaphase and Prophase

3. Prophase and Anaphase

4. Metaphase and Telophase

Q. The picture depicts what stage of meiosis?

1. prophase 1
2. anaphase 1
3. metaphase 1
4. metaphase 2

Q.

Shown below are four stages (A, B, C, D) (not in sequence) of a certain kind of cell division.
(a) Is it a plant cell or an animal cell? Give two
reasons
(b) Is it undergoing mitosis or meiosis?
(c) What should be the correct sequence of these four stages among themselves?
(d) Name the stage that should precede the earliest of these stages
(e) Draw the stage named above inside the blank space provided.

Q. Which of the following is the first stage of Prophase of meiosis?

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

Q. If an ovum gives rise to a plant without being fertilised, this process is called

Q. With the help of suitable diagrams, explain the mitosis in detail.