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 reduced to 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