Match the following with respect to meiosis (a) Zygotene (i) Terminalization (b) Pachytene (ii) Chiasmata (c) Diplotene (iii) Crossing over (d) Diakinesis (iv) Synapsis Select the correct option from the following

(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

(a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)

(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)

(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

One cycle of DNA replication but two cycles each of cell division and nuclear division

Two cycles each of DNA replication, cell division and nuclear division

Two cycles of DNA replication but one cycle each of cell division and nuclear division

One cycle each of DNA replication, cell division and nuclear division

Select the correct option: I II ( a ) Synapsis aligns homologous chromosomes ( i ) Anaphase – II ( b ) Synthesis of RNA and protein ( i i ) Zygotene ( c ) Action of enzyme recombinase ( i i i ) G 2 – phase ( d ) Centromeres do not separate but chromatids move towards opposite poles ( i v ) Anaphase – I ( v ) Pachytene

( a ) ( i i ) ( b ) ( i i i ) ( c ) ( v ) ( d ) ( i v )

( a ) ( i i ) ( b ) ( i ) ( c ) ( i i i ) ( d ) ( i v )

( a ) ( i ) ( b ) ( i i ) ( c ) ( v ) ( d ) ( i v )

( a ) ( i i ) ( b ) ( i i i ) ( c ) ( i v ) ( d ) ( v )

EASY

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Meiosis I and Meiosis II are characterised by the separation of:

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Important Questions on Cell Cycle and Cell Division

MEDIUM

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

Match the changes which occur in the chromosomes during meiosis, with the different phases of prophase-I.

	List - I		List - II
(a)	Pachytene	(i)	Compaction of chromosomes
(b)	Zygotene	(ii)	Terminalisation of chiasmata
(c)	Diplotene	(iii)	Pairing of chromosomes
(d)	Leptotene	(iv)	Dissolution of synaptonemal complex
		(v)	Recombination nodule

The correct answer is

EASY

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

During meiosis

I,

in which stage synapsis takes place?

MEDIUM

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

Arrange the following statements on meiosis in a correct sequence.
A) Terminalisation of chiasmata.
B) Dissolution of synaptonemal complex.
C) Homologous chromosome separation.
D) Appearance of recombination nodules.
E) Pairing of homologous chromosomes.
F) Disappearance of nuclear envelope.

MEDIUM

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

Number of bivalents, chromatid tetrads, DNA strands, telomers present in pachytene phase of meiocyte of Maize

MEDIUM

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

Match the stages of meiosis of Column-I to their characteristic features in Column-II and select the correct option using the codes given below:

Column-I		Column–II
a.	Pachytene	(i)	The pairing of homologous chromosomes
b.	Metaphase I	(ii)	Terminalization of chiasmata
c.	Diakinesis	(iii)	Crossing-over takes place
d.	Zygotene	(iv)	Chromosomes align at the equatorial plate

EASY

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

In prophase I of meiosis, synaptonemal complex is formed between

I)

Pair of homologous chromosomes

I I)

Tetrad of chromatids

I I I)

Bivalent chromosomes

I V)

Recombination modules of non sister chromatids

EASY

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

Identify the event in meiosis mediated by the enzyme recombinase.

EASY

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

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

EASY

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

The enzyme recombinase is required at which stage of meiosis:

MEDIUM

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

Match the following with respect to meiosis

(a)	Zygotene	(i)	Terminalization
(b)	Pachytene	(ii)	Chiasmata
(c)	Diplotene	(iii)	Crossing over
(d)	Diakinesis	(iv)	Synapsis

Select the correct option from the following

EASY

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

The correct sequence of events in prophase I is:

MEDIUM

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

Arrange the following events of meiosis in the correct sequence:

i. Crossing over

ii. Synapsis

iii. Terminalisation of chiasmata

iv. Disappearance of the nucleolus

EASY

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

Meiosis involves:

EASY

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

Assertion $(A) :$ In crossing over, the exchange of genetic material between two homologous chromosomes occur during both mitotic and meiotic cell divisions.

Reason $(R) :$ The process of crossing over is only possible and is mediated by recombinase.

The correct answer is:

EASY

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

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

EASY

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

The appearance of recombination nodules on homologous chromosomes during meiosis characterizes:

EASY

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

Meiocytes are _______

EASY

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

Dissolution of the synaptonemal complex occurs during

MEDIUM

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

Select the correct option:

	I		II
( $a$ )	Synapsis aligns homologous chromosomes	( $i$ )	Anaphase – II
( $b$ )	Synthesis of RNA and protein	( $i i$ )	Zygotene
( $c$ )	Action of enzyme recombinase	( $i i i$ )	$G_{2}$ – phase
( $d$ )	Centromeres do not separate but chromatids move towards opposite poles	( $i v$ )	Anaphase – I
		( $v$ )	Pachytene

EASY

Biology>Cell : Structure and Functions>Cell Cycle and Cell Division>Meiosis

In meiosis, crossing over is initiated at _________.

Meiosis I and Meiosis II are characterised by the separation of:

Important Questions on Cell Cycle and Cell Division

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