Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

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

1. Chromosomes are moved to spindle equator.

2. Centromere splits and chromatids separate.

3. Pairing between homologous chromosomes takes place.

4. Crossing over between homologous chromosomes takes place.

185 Views

42. Describe the following

1. Synapsis
2. Bivalent
3. Chiasmata.

Draw diagrams to illustrate your answer.

248 Views

43.

Discuss with your teacher about.

1. haploid insects and lower plants where cell division occurs, and

2. Some haploid cells in higher plants where cell division does not occur.

190 Views

44. Find examples where the four daughter cells from meiosis are equal in size and where they are found unequal in size.

223 Views

45. Analyse the events during every stage of cell cycle and notice how the following two parameters change.

1. Number of chromosomes per cell.

2. Amount of DNA content (C) per cell.

190 Views

Mitosis	Meiosis
1. Equational division. Chromosome number remains the same in the daughter cells.	1. Reduction division. Chromosome number is resuced to half in the daughter cell.
2. Occurs in somatic cells	2. Occurs in germ cells.
3. Occurs in both sexually and asexually reproducing organisms.	3. Occurs only in sexually reproducing organisms.
4. No crossing over takes place.	4. Crossing over takes place during pachytene stage.
5. Prohase is simple and not divided into sub stages.	5. Prohase I of meiosis I is complex and has 5 stages.