Pachytene

Q. During gamete formation, the enzyme recombinase participates during

1. Prophase I
2. Prophase II
3. Metaphase I
4. Anaphase II

Q. The complex formed by a pair of synapsed homologous chromosomes is called

1. Equatorial plate
2. Kinetochore
3. Bivalent
4. Axoneme

Q. Crossing over takes place between which chromatids and in which stage of the cell cycle?

1. Non-sister chromatids of non-homologous chromosome at zygotene stage of prophase-I
2. Non-sister chromatids of homologous chromosome at pachytene stage of prophase-I
3. Non-sister chromatids of homologous chromosome at zygotene stage of prophase I
4. Non-sister cromatids of non-homologous chromosomes at pachytene stage of prophase I

Q.

Synapsis is a pairing of ___________ chromosome.

Q.

Name the stage of cell cycle at which one of the following events occur:

(i) Chromosomes are moved to spindle equator

(ii) Centromere splits and chromatids separate

(iii) Pairing between homologous chromosomes takes place

(iv) Crossing over between homologous chromosomes takes place

Q.

During which stage of Prophase I, does the crossing over takes place ?

1. Pachytene

2. Leptotene

3. Zygotene

4. Diplotene

Q. Given below is the representation of a certain event at a particular stage of a type of cell division which is this stage:

1. Prophase of mitosis
2. Both prophase and metaphase of mitosis
3. Prophase I during meiosis
4. Prophase II during meiosis

Q.

Name the stage of cell cycle at which one of the following events occur:

(i) Chromosomes are moved to spindle equator

(ii) Centromere splits and chromatids separate

(iii) Pairing between homologous chromosomes takes place

(iv) Crossing over between homologous chromosomes takes place

Q. Crossing over takes place in

1. zygotene
2. pachytene
3. diplotene
4. diakinesis

Q.

Which stage of cell division is responsible for genetic variations and evolution of species?

1. Diplotene

2. Diakinesis

3. Pachytene

4. Anaphase II