Question

Match the items in Column-I with those in Column-II, and choose the CORRECT answer

Answer 1

Mitosis is a form of eukaryotic cell division that produces two daughter cells with the same genetic component as the parent cell. Chromosomes replicated during the S phase are divided in such a way, that each daughter cell receives a copy of every chromosome.

Meiosis is the form of eukaryotic cell division that produces haploid sex cells or gametes (which contain a single copy of each chromosome) from diploid cells (which contain two copies of each chromosome). In prophase I the homologous chromosomes pair and exchange DNA to form recombinant chromosomes. The prophase I is divided into 5 phases namely:

1. Leptotene: chromosomes start to condense.

2. Zygotene: homologous chromosomes become closely associated (synapsis) to form pairs of chromosomes (bivalents) consisting of four chromatids (tetrads).

3. Pachytene: crossing over between pairs of homologous chromosomes to form chiasmata.

4. Diplotene: homologous chromosomes start to separate but remain attached by chiasmata.

5. Diakinesis: homologous chromosomes continue to separate, and chiasmata move to the ends of the chromosomes.