Mitosis is characterised by

1. reduction division

2. equal division

3.  Both (1) and (2)

4. pairing of homologous chromosomes

A bivalent meiosis-I consists of

1.  two chromatids and one centromere

2.  two chromatids and two centromeres

3.  four chromatids and two centromeres

4.  four chromatids and four centromeres

Cells which are not dividing are likely to be at

1.  G₁

2.  G₂

3.  G₀

4.  S-phase

Which of the events listed below is not observed during mitosis?

1.  Chromatin condensation
2.  Movement of centrioles to opposite poles
3.  Appearance of chromosomes with two chromosomes joined together at the centromere
4.  Crossing over

Identify the wrong statement about meiosis

1.  Pairing of homologous chromosomes

2.  Four haploid cells are formed

3.  At the end of meiosis the number of chromosomes are reducedto half

4.  Two cycle of DNA replication occurs

Select the correct statement about G₁ phase

1.  cell is metabolically inactive

2.  DNA in the cell does not replicate

3.  it is not a phase of synthesis of macromolecules

4.  cell stops growing

During Anaphase-I of meiosis

1.  homologous chromosomes separate

2.  non-homologous autosomes separate

3.  sister chromatids separate

4.  non-sister chromatids separate

Meiosis occursin organisms during

1.  sexual reproduction

2.  vegetative reproduction

3.  Both (a) and (b)

4.  None of these

At which stage of meiosis does the genetic constitution of gametes is finally decided

1. Metaphase-I

2. Anaphase-II

3. Metaphase-ll

4. Anaphase-I

Meiosis in diploid organisms results in:

1.  production of gametes

2.  reduction in the number of chromosomes

3.  introduction of variation

4.  All of the above