Spindle fibres attach on to:                                                                                                                                
1. Kinetosome of the chromosome
2. Telomere of the chromosome
3. Kinetochore of the chromosome
4. Centromere of the chromosome

Centromere is required for
1. Crossing over
2. Transcription
3. Cytoplasmic cleavage
4. Movement of chromosomes towards poles

After meiosis I, the resultant daughter cells have

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

Which of the following is the correct sequence of events of interphase:-

a. cells metabolically active

b. Duplication of the chromosome but chromosome number remains constant

c. M phased

d. Synthesis of protein [Tubulin]

1. $\mathrm{a}\to \mathrm{b}\to \mathrm{c}\to \mathrm{d}$

2. $\mathrm{a}\to \mathrm{d}\to \mathrm{b}\to \mathrm{c}$

3. $\mathrm{a}\to \mathrm{b}\to \mathrm{d}\to \mathrm{c}$

4. $\mathrm{a}\to \mathrm{c}\to \mathrm{d}\to \mathrm{b}$ 

Which of the following is characteristic of prophase I of meiosis I:-

1.  Synapsis in zygotene, genetically different chromatid are seen in pachytene

2.  Exchange of genes in leptotene, genetically similar chromatids are seen in zygotene.

3.  Chiasmata are present in metaphase

4.  Splitting of centromere in anaphase-I

The correct sequence of phases in cell cycle is:

1. ${\mathrm{G}}_1\to \mathrm{S}\to {\mathrm{G}}_2\to \mathrm{M}$

2. $\mathrm{M}\to {\mathrm{G}}_1\to {\mathrm{G}}_2\to \mathrm{S}$

3. ${\mathrm{G}}_1\to {\mathrm{G}}_2\to \mathrm{S}\to \mathrm{M}$

4. $\mathrm{S}\to {\mathrm{G}}_1\to {\mathrm{G}}_2\to \mathrm{M}$

Cells in ${\mathrm{G}}_0$ phase:
1. terminate the cell cycle
2. exit the cell cycle
3. enter the cell cycle
4. suspend the cell cycle