It is said that the one cycle of cell division in human cells (eukaryotic cells) takes 24 hours. Which phase of the cycle, do you think occupies the maximum part of cell cycle?

An anther has 1200 pollen grains. How many pollen mother cells must have been there to produce them?

At what stage of cell cycle does DNA synthesis take place?

It is observed that heart cells do not exhibit cell division. Such cells do not divide further and exit ___________ phase to enter an inactive stage called ___________ of cell cycle. Fill in the blanks.

In which phase of meiosis are the following formed? Choose the answers from hint points given below.

a. Synaptonemal complex ____________________________

b. Recombination nodules ____________________________

c. Appearance/activation of ____________________________

enzyme recombinase

d. Termination of chiasmata _ ___________________________

e. Interkinesis ____________________________

f. Formation of dyad of cells _ ___________________________

Hints : 1) Zygotene, 2) Pachytene, 3) Pachytene, 4) Diakinesis, 5) After Telophase-I /before Meosis-II, 6) Telophase-I /After Meiosis-I.