Name the phase of the cell cycle at which each one of the following events takes place:
i. When chromosomes are transferred to the spindle equator.
ii. When centromere splits and chromatids separate.
iii. When a pairing between homologous chromosomes takes place.
iv. When a crossing over among homologous chromosomes occurs.
Analyse the events during every stage of cell cycle and notice how the following two parameters change
(i) number of chromosomes (N) per cell
(ii) amount of DNA content (C) per cell
Can there be mitosis without DNA replication in the ‘S’ phase?
Discuss with your teacher about
(i) haploid insects and lower plants where cell-division occurs.
(ii) some haploid cells in higher plants where cell-division does not occur.
Distinguish anaphase of mitosis from anaphase 1 of meiosis.