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Mitosis Made Easy: Prophase to Telophase NEET Biology Notes

Cell Division: Easy Mitosis Notes for NEET Exam Preparation 

Illustration of mitosis showing Prophase, Metaphase, Anaphase and Telophase with chromosomes, spindle fibres, centromeres and daughter nuclei.
Stages of Mitosis showing chromosome condensation, alignment, separation and formation of two daughter nuclei.

- Dr.Sanjaykumar Pawar 

Metaphase (Mitosis) – Notes

  • Metaphase is the second phase of mitosis.
    It starts after the nuclear envelope completely breaks down.

  • Nuclear membrane disappears completely.
    So, chromosomes are now freely spread in the cytoplasm.

  • Chromosomes are fully condensed.
    They become short, thick, and clearly visible under the microscope.

  • This is the best stage to study chromosome shape and structure.
    Because chromosomes are most distinct at this time.

  • Each chromosome consists of two identical sister chromatids.
    These chromatids are exact copies of each other.

  • Both sister chromatids are joined at a point called the centromere.
    The centromere holds them together.

  • At the centromere, disc-shaped structures called kinetochores are present.
    These act as attachment points.

  • Spindle fibres attach to the kinetochores.
    These fibres come from opposite poles of the cell.

  • Chromosomes start moving toward the centre of the cell.
    This movement is guided by spindle fibres.

  • All chromosomes align at the equatorial region of the cell.
    This central line is called the equator.

  • The imaginary plane where chromosomes align is called the metaphase plate.
    It is exactly at the middle of the cell.

  • Each chromosome is attached to spindle fibres from both poles.
    One chromatid attaches to one pole, and the other chromatid to the opposite pole.

Key Features of Metaphase (NEET Important Points)

  • Spindle fibres attach to kinetochores of chromosomes.
  • Chromosomes align at the equatorial (metaphase) plate.
  • Each chromatid is connected to opposite poles via spindle fibres.
  • Chromosomes are maximally condensed and clearly visible.

Anaphase (Mitosis) –  Notes

  • Anaphase is the third stage of mitosis.
    It starts after metaphase.

  • It begins suddenly with the splitting of chromosomes.
    All chromosomes at the metaphase plate separate at the same time.

  • The centromere of each chromosome divides.
    This separates the two sister chromatids.

  • Once separated, sister chromatids are called daughter chromosomes.
    They will become part of the future daughter nuclei.

  • Each daughter chromosome starts moving toward opposite poles.
    One goes to one pole, the other goes to the opposite pole.

  • This movement is controlled by spindle fibres.
    Spindle fibres pull the chromosomes apart.

  • During movement, centromere leads the way.
    It faces toward the pole.

  • The arms of the chromosome trail behind.
    So the chromosome looks V-shaped or rod-like while moving.

  • Chromosomes move away from the equatorial plate.
    They move toward the two opposite ends of the cell.

Key Features of Anaphase (NEET Important Points)

  • Centromeres split into two.
  • Sister chromatids separate from each other.
  • Chromatids are now called daughter chromosomes.
  • Daughter chromosomes move to opposite poles.
  • Spindle fibres help in pulling and movement.

Telophase (Mitosis) – Line by Line Notes

  • Telophase is the final stage of karyokinesis (nuclear division).
    It occurs after anaphase.

  • Chromosomes reach opposite poles of the cell.
    One complete set is present at each pole.

  • Chromosomes start to uncoil (decondense).
    They become thin and less visible.

  • Chromosomes lose their distinct shape and identity.
    They are no longer seen as separate chromosomes.

  • They form a mass of chromatin material at each pole.
    This chromatin is less condensed.

  • A new nuclear membrane starts forming around each chromosome group.
    This happens at both poles.

  • Two daughter nuclei are formed.
    Each nucleus contains a complete set of chromosomes.

  • Nucleolus reappears inside each new nucleus.
    It becomes visible again.

  • Cell organelles begin to reform.
    Golgi complex and endoplasmic reticulum (ER) reappear.

Key Features of Telophase (NEET Important Points)

  • Chromosomes decondense and lose individuality.
  • Chromatin collects at opposite poles.
  • Nuclear envelope reforms around each set.
  • Two daughter nuclei are formed.
  • Nucleolus, Golgi complex, and ER reappear.

complete CBSE Class 11 NEET/Board-level question bank on MITOSIS (Prophase, Metaphase, Anaphase, Telophase) including all requested types.

🧬 MITOSIS – QUESTION BANK (Class 11 CBSE)

✅ 1. VERY SHORT ANSWER QUESTIONS (1 mark)

Q1. What is mitosis?
Ans: Mitosis is an equational division in which one parent cell forms two identical daughter cells.

Q2. Name the stage where chromosomes align at the equator.
Ans: Metaphase.

Q3. What is the function of spindle fibres?
Ans: They help in movement and separation of chromosomes.

Q4. What is the role of centromere?
Ans: It holds sister chromatids together.

Q5. What is cytokinesis?
Ans: Division of cytoplasm into two daughter cells.

✏️ 2. SHORT ANSWER QUESTIONS (2–3 marks)

Q1. What happens during metaphase?
Ans:

  • Chromosomes align at equatorial plate
  • Spindle fibres attach to kinetochores
  • Chromosomes are maximally condensed

Q2. Write two features of anaphase.
Ans:

  • Centromeres split
  • Sister chromatids move to opposite poles

Q3. What changes occur in telophase?
Ans:

  • Chromosomes decondense
  • Nuclear envelope reforms
  • Two daughter nuclei form

🧠 3. LONG ANSWER QUESTIONS (5 marks)

Q1. Explain all stages of mitosis briefly.
Ans:

  • Prophase: Chromosomes condense, nuclear membrane disappears
  • Metaphase: Chromosomes align at equator
  • Anaphase: Chromatids separate and move to poles
  • Telophase: Nuclear membrane reforms, chromosomes decondense
  • Cytokinesis: Cytoplasm divides forming two cells

Q2. Explain metaphase in detail.
Ans:

  • Nuclear membrane disappears
  • Chromosomes align at metaphase plate
  • Each chromatid attached to spindle fibres via kinetochore
  • Spindle fibres pull chromosomes from opposite poles
  • Best stage for chromosome study

🧾 4. MCQs (Multiple Choice Questions)

Q1. Chromosomes align at which stage?
A) Prophase
B) Metaphase
C) Anaphase
D) Telophase
Ans: B

Q2. Centromere splits during:
A) Prophase
B) Metaphase
C) Anaphase
D) Telophase
Ans: C

Q3. Nuclear membrane reforms in:
A) Prophase
B) Metaphase
C) Anaphase
D) Telophase
Ans: D

Q4. Spindle fibres attach to:
A) Nucleolus
B) Chromatin
C) Kinetochore
D) Cytoplasm
Ans: C

🔍 5. ASSERTION & REASON

Q1.
Assertion (A): Chromosomes are best visible in metaphase.
Reason (R): Chromosomes are highly condensed and aligned at equator.

Ans: Both A and R are true, and R is correct explanation.

Q2.
Assertion (A): Sister chromatids separate during telophase.
Reason (R): Centromeres split in anaphase.

Ans: A is false, R is true.

✍️ 6. FILL IN THE BLANKS

  1. Spindle fibres attach to __________.
    Ans: Kinetochore

  2. Chromosomes align at __________ plate.
    Ans: Metaphase

  3. Centromere splits during __________.
    Ans: Anaphase

  4. Nuclear membrane reforms in __________.
    Ans: Telophase

🔗 7. MATCH THE COLUMN

Column A Column B
Metaphase Chromosomes align
Anaphase Chromatids separate
Telophase Nuclear membrane reforms
Prophase Chromosomes condense

Answers:
Metaphase → Chromosomes align
Anaphase → Chromatids separate
Telophase → Nuclear membrane reforms
Prophase → Chromosomes condense

📖 8. STATEMENT QUESTIONS

Q1. Statement 1: Chromosomes are most visible in metaphase.
Statement 2: They are least condensed in metaphase.

Ans: Statement 1 is true, Statement 2 is false.

Q2. Statement 1: Anaphase involves chromosome separation.
Statement 2: Centromeres remain intact in anaphase.

Ans: Statement 1 true, Statement 2 false.

📊 9. CASE STUDY QUESTION

A cell is observed under a microscope. Chromosomes are aligned at the center, spindle fibres are attached to kinetochores, and nuclear membrane is absent.

Q1. Identify the stage.
Ans: Metaphase

Q2. What structure connects chromosomes to spindle fibres?
Ans: Kinetochore

Q3. What is the central alignment region called?
Ans: Metaphase plate

Q4. What will happen next?
Ans: Chromatids will separate during anaphase


Internal Links

Cell Cycle – Complete NCERT Notes

Meiosis vs Mitosis – Complete Comparison

Cell: Structure and Function Notes

Biomolecules Revision Notes

Biological Classification Notes

Morphology of Flowering Plants

Anatomy of Flowering Plants

Plant Kingdom Revision Notes

Animal Kingdom Complete Notes

NEET Biology Chapter-wise MCQs

Metaphase Mind Map

Metaphase (Mitosis) - Mind Map

Metaphase
|
|-- 1. Stage in Mitosis
|     |-- Second phase of mitosis
|     |-- Follows nuclear envelope breakdown
|
|-- 2. Nuclear Changes
|     |-- Nuclear membrane disappears completely
|     |-- Chromosomes spread in cytoplasm
|
|-- 3. Chromosome Structure
|     |-- Fully condensed chromosomes
|     |-- Visible under microscope
|     |-- Each chromosome has two sister chromatids
|     |-- Sister chromatids joined at centromere
|
|-- 4. Kinetochore
|     |-- Disc-shaped structure at centromere
|     |-- Site for spindle fibre attachment
|
|-- 5. Spindle Fibres
|     |-- Attach to kinetochores
|     |-- Extend from opposite poles
|     |-- Help in movement of chromosomes
|
|-- 6. Chromosome Alignment
|     |-- Chromosomes move to equator
|     |-- Aligned at metaphase plate
|     |-- One chromatid attached to each pole
|
|-- 7. Metaphase Plate
|     |-- Imaginary central plane of cell
|     |-- Site of chromosome alignment
|
|-- 8. Key Features
      |-- Spindle fibres attach to kinetochores
      |-- Chromosomes align at equator
      |-- Equal tension from both poles
Anaphase Mind Map

Anaphase (Mitosis) - Mind Map

Anaphase
|
|-- 1. Stage of Mitosis
|     |-- Third stage of mitosis
|     |-- Follows metaphase
|
|-- 2. Start of Anaphase
|     |-- Sudden splitting of centromere
|     |-- Sister chromatids separate simultaneously
|
|-- 3. Chromatids
|     |-- Each chromatid becomes a daughter chromosome
|     |-- Future part of daughter nucleus
|
|-- 4. Movement of Chromosomes
|     |-- Daughter chromosomes move to opposite poles
|     |-- Movement controlled by spindle fibres
|
|-- 5. Role of Centromere
|     |-- Remains attached to spindle fibres
|     |-- Leads the movement toward pole
|
|-- 6. Chromosome Orientation
|     |-- Centromere faces pole (leading edge)
|     |-- Chromosome arms trail behind
|     |-- Often V-shaped appearance during movement
|
|-- 7. Spindle Fibres
|     |-- Pull chromatids apart
|     |-- Shorten to move chromosomes
|
|-- 8. Key Features
      |-- Centromeres split
      |-- Chromatids separate
      |-- Chromosomes move to opposite poles
Telophase Mind Map

Telophase (Mitosis) - Mind Map

Telophase
|
|-- 1. Stage of Mitosis
|     |-- Final stage of karyokinesis
|     |-- Follows anaphase
|
|-- 2. Chromosome Changes
|     |-- Chromosomes reach opposite poles
|     |-- Begin decondensation (uncoiling)
|     |-- Lose distinct individuality
|     |-- Become chromatin network
|
|-- 3. Nuclear Reformation
|     |-- Nuclear envelope reappears
|     |-- Forms around each chromosome set
|     |-- Two daughter nuclei formed
|
|-- 4. Nucleolus and Organelles
|     |-- Nucleolus reappears
|     |-- Golgi complex reforms
|     |-- Endoplasmic reticulum (ER) reforms
|
|-- 5. Cell Condition
|     |-- Two nuclei present at opposite poles
|     |-- Cell prepares for cytokinesis
|
|-- 6. Key Features
      |-- Chromosomes decondense
      |-- Nuclear membrane reforms
      |-- Two daughter nuclei formed
      |-- Cell organelles reappear
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