Meiosis
BIOXI10: CELL CYCLE AND CELL DIVISION

336003 Statement A :
Crossing over is the exchange of genetic material between two non-homologous chromosomes.
Statement B :
Crossing over is an enzyme-mediated process and the enzyme involved is called recombinase.

1 Statement-A is correct but Statement-B is incorrect.
2 Statement-A is incorrect but Statement-B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
BIOXI10: CELL CYCLE AND CELL DIVISION

336004 Which one is correct about crossing over/ genetic recombination?
(i) It occurs in tetrad stage which occurs in pachytene of prophase I of meiosis I.
(ii) It occurs between non-sister chromatids of homologous chromosomes. (iii) It is recombinase enzyme mediated process.
(iv) It is also the reciprocal transfer of genes between the non- homologous chromosomes

1 All of the above
2 All except (iv)
3 (ii), (iii) and (iv)
4 (iii) and (iv)
BIOXI10: CELL CYCLE AND CELL DIVISION

336005 In meiosis crossing over is initiated at

1 Zygotene
2 Diplotene
3 Pachytene
4 Leptotene
BIOXI10: CELL CYCLE AND CELL DIVISION

336006 Match the columns I and II and choose the correct option.
Column I
Column II
A
Pairing of chromosomes together
P
Bivalent
B
Pair of synapsed homologous chromosomes
Q
Pachytene
C
Appearance of recombination nodules
R
Synapsis
D
Crossing over
S
Recombinase

1 A-R, B-S, C-Q, D-P
2 A-R, B-S, C-P, D-Q
3 A-P, B-Q, C-S, D-Q
4 A-R, B-P, C-Q, D-S
BIOXI10: CELL CYCLE AND CELL DIVISION

336003 Statement A :
Crossing over is the exchange of genetic material between two non-homologous chromosomes.
Statement B :
Crossing over is an enzyme-mediated process and the enzyme involved is called recombinase.

1 Statement-A is correct but Statement-B is incorrect.
2 Statement-A is incorrect but Statement-B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
BIOXI10: CELL CYCLE AND CELL DIVISION

336004 Which one is correct about crossing over/ genetic recombination?
(i) It occurs in tetrad stage which occurs in pachytene of prophase I of meiosis I.
(ii) It occurs between non-sister chromatids of homologous chromosomes. (iii) It is recombinase enzyme mediated process.
(iv) It is also the reciprocal transfer of genes between the non- homologous chromosomes

1 All of the above
2 All except (iv)
3 (ii), (iii) and (iv)
4 (iii) and (iv)
BIOXI10: CELL CYCLE AND CELL DIVISION

336005 In meiosis crossing over is initiated at

1 Zygotene
2 Diplotene
3 Pachytene
4 Leptotene
BIOXI10: CELL CYCLE AND CELL DIVISION

336006 Match the columns I and II and choose the correct option.
Column I
Column II
A
Pairing of chromosomes together
P
Bivalent
B
Pair of synapsed homologous chromosomes
Q
Pachytene
C
Appearance of recombination nodules
R
Synapsis
D
Crossing over
S
Recombinase

1 A-R, B-S, C-Q, D-P
2 A-R, B-S, C-P, D-Q
3 A-P, B-Q, C-S, D-Q
4 A-R, B-P, C-Q, D-S
BIOXI10: CELL CYCLE AND CELL DIVISION

336003 Statement A :
Crossing over is the exchange of genetic material between two non-homologous chromosomes.
Statement B :
Crossing over is an enzyme-mediated process and the enzyme involved is called recombinase.

1 Statement-A is correct but Statement-B is incorrect.
2 Statement-A is incorrect but Statement-B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
BIOXI10: CELL CYCLE AND CELL DIVISION

336004 Which one is correct about crossing over/ genetic recombination?
(i) It occurs in tetrad stage which occurs in pachytene of prophase I of meiosis I.
(ii) It occurs between non-sister chromatids of homologous chromosomes. (iii) It is recombinase enzyme mediated process.
(iv) It is also the reciprocal transfer of genes between the non- homologous chromosomes

1 All of the above
2 All except (iv)
3 (ii), (iii) and (iv)
4 (iii) and (iv)
BIOXI10: CELL CYCLE AND CELL DIVISION

336005 In meiosis crossing over is initiated at

1 Zygotene
2 Diplotene
3 Pachytene
4 Leptotene
BIOXI10: CELL CYCLE AND CELL DIVISION

336006 Match the columns I and II and choose the correct option.
Column I
Column II
A
Pairing of chromosomes together
P
Bivalent
B
Pair of synapsed homologous chromosomes
Q
Pachytene
C
Appearance of recombination nodules
R
Synapsis
D
Crossing over
S
Recombinase

1 A-R, B-S, C-Q, D-P
2 A-R, B-S, C-P, D-Q
3 A-P, B-Q, C-S, D-Q
4 A-R, B-P, C-Q, D-S
BIOXI10: CELL CYCLE AND CELL DIVISION

336003 Statement A :
Crossing over is the exchange of genetic material between two non-homologous chromosomes.
Statement B :
Crossing over is an enzyme-mediated process and the enzyme involved is called recombinase.

1 Statement-A is correct but Statement-B is incorrect.
2 Statement-A is incorrect but Statement-B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
BIOXI10: CELL CYCLE AND CELL DIVISION

336004 Which one is correct about crossing over/ genetic recombination?
(i) It occurs in tetrad stage which occurs in pachytene of prophase I of meiosis I.
(ii) It occurs between non-sister chromatids of homologous chromosomes. (iii) It is recombinase enzyme mediated process.
(iv) It is also the reciprocal transfer of genes between the non- homologous chromosomes

1 All of the above
2 All except (iv)
3 (ii), (iii) and (iv)
4 (iii) and (iv)
BIOXI10: CELL CYCLE AND CELL DIVISION

336005 In meiosis crossing over is initiated at

1 Zygotene
2 Diplotene
3 Pachytene
4 Leptotene
BIOXI10: CELL CYCLE AND CELL DIVISION

336006 Match the columns I and II and choose the correct option.
Column I
Column II
A
Pairing of chromosomes together
P
Bivalent
B
Pair of synapsed homologous chromosomes
Q
Pachytene
C
Appearance of recombination nodules
R
Synapsis
D
Crossing over
S
Recombinase

1 A-R, B-S, C-Q, D-P
2 A-R, B-S, C-P, D-Q
3 A-P, B-Q, C-S, D-Q
4 A-R, B-P, C-Q, D-S