The importance of meiosis lies in :

• bringing discontinuous variations

• addition in the number of chromosomes

• reduction in the number of chromosomes

• maintaining the number of chromosomes

In mitotic cell division, the division of centromere and the division of chromatid occurs between

• anaphase and telophase

• prophase and metaphase

• telophase and interphase

• anaphase and metaphase

Spindle chromosomes have

• centriole

• kinetochore

• chromocentre

• chromomere

In mitosis the duplication of chromosomes occurs during

• early prophase

• late prophase

• interphase

• late telophase

115.

Bivalents in meiosis are

• tetrad

• pairs of non-homologous chromosomes

• pairs of several chromatids

• pairs of homologous chromosomes

In which stage of the first meiotic division, each chromosome undergoes longitudinal division to give rise to two sister chromatids ? 

• Zygotene

• Diplotene

• Diakinesis

• Pachytene

Which of the following sequence is a correct one for meiotic cell cycle?

• G_1 $\to$S $\to$G₂ $\to$ M $\to$G₁

• G₁ $\to$G₂ $\to$S $\to$M $\to$G₂

• G₂ $\to$G₁ $\to$S $\to$M $\to$G₂

• S $\to$G₁ $\to$G₂ $\to$M $\to$S

Chromosomes replicate in which stage of meiosis?

• Prophase- I

• Prophase- II

• Telophase- I

• Interphase

In which stage of cell division chromosomes are most condensed

• Prophase

• Metaphase

• Anaphase

• Telophase

Which phase comes in between the G₁ and G₂ phases of cell cycle?

• M - phase

• G₀ - phase

• S - phase

• Interphase