During $meiosis-I$,the bivalent chromosomes clearly appear as tetrads during

Which of the following stages of meiosis involves division of the centromere?

After $Meiosis-I$,the two sister chromatids of a chromosome are:

Match the stages of meiosis in Column-$I$ to their characteristic features in Column-$II$ and select the correct option using the codes given below.

Column-$I$	Column-$II$
$(A)$ Pachytene	$(i)$ Pairing of homologous chromosomes
$(B)$ Metaphase-$I$	$(ii)$ Terminalisation of chiasmata
$(C)$ Diakinesis	$(iii)$ Crossing-over takes place
$(D)$ Zygotene	$(iv)$ Chromosomes align at equatorial plate

The second division in meiosis is called

Give scientific reason: Meiosis and gametogenesis are always interlinked.