Question 8
Which of the events listed below is not observed during mitosis?
(a) Chromatin condensation
(b) Movement of centrioles to opposite poles
(c) Appearance of chromosomes with two chromosome joined together at the centromere
(d) Crossing over

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Solution

Option (d) Crossing over

Crossing Over is the phenomenon of genetic exchange between homologous pair of chromosomes and is a characteristic feature of meiotic cell division. It does not occur in mitosis. Rest of the options represent stages in mitosis.

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Similar questions

Q. The events shown below occur during different phases:
a. Centromere splits, chromatids separate and move to opposite poles, chromatids are now called chromosomes.
b. Chromosomes cluster at opposite poles, decondensation of chromosomes, reappearance of the nuclear membrane, golgi bodies, and the ER.
c. Chromosomal replication.
d. Kinetochores attach to spindle fibres and chromosomes are arranged at the equatorial plate.
e. Condensation of chromosomal materials.

Which of the following correctly identifies each of the phases described?

Q. Chromosomes separating at the centromere and moving to opposite sides of the cell is an event that occurs during which phase of mitosis?

Q. Which of the following events takes place during anaphase stage of mitosis?
I. Spindle fibres attach to kinetochores of chromosomes
II. Centromeres split and chromatids separate
III. Chromatids move to opposite poles
IV. Nucleolous, Golgi complex and E.R. reform

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:

$\begin{matrix} C o l u m n I S t a g e s o f m i t o s i s & C o l u m n I I I m p o r t a n t e v e n t s A & I n t e r p h a s e & p & E q u a t o r i a l p l a t e f o r m a t i o n B & M e t a p h a s e & q & D a u g h t e r c h r o m o s o m e s m o v e t o o p p o s i t e p o l e s C & A n a p h a s e & r & C e n t r i o l e s d i v d e s & S y n t h e t i c p h a s e \end{matrix}$

$\begin{matrix} C o l u m n I S t a g e s o f m i t o s i s & C o l u m n I I I m p o r t a n t e v e n t s A & Interphase & p & Equatorial plate formation B & Metaphase & q & Daughter chromosomes move to opposite poles C & Anaphase & r & Centrioles divde s & Synthetic phase \end{matrix}$

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Question 8 Which of the events listed below is not observed during mitosis? (a) Chromatin condensation (b) Movement of centrioles to opposite poles (c) Appearance of chromosomes with two chromosome joined together at the centromere (d) Crossing over

Option (d) Crossing over Crossing Over is the phenomenon of genetic exchange between homologous pair of chromosomes and is a characteristic feature of meiotic cell division. It does not occur in mitosis. Rest of the options represent stages in mitosis.

Question 8
Which of the events listed below is not observed during mitosis?
(a) Chromatin condensation
(b) Movement of centrioles to opposite poles
(c) Appearance of chromosomes with two chromosome joined together at the centromere
(d) Crossing over

Option (d) Crossing over

Crossing Over is the phenomenon of genetic exchange between homologous pair of chromosomes and is a characteristic feature of meiotic cell division. It does not occur in mitosis. Rest of the options represent stages in mitosis.