What is not seen during mitosis in somatic cells?

During which stage does the chiasmata become visible?

Identify the correct sequence of events during Prophase $I$ of meiosis :
$(a)$ Synapsis of homologous chromosomes
$(b)$ Chromosomes become gradually visible under microscope
$(c)$ Crossing over between non-sister chromatids of homologous chromosomes
$(d)$ Terminalisation of chiasmata
$(e)$ Dissolution of synaptonemal complex
Choose the correct answer from the options given below :

Gamete mother cells with the chromosome constitution $44+XY$ suffer from non-disjunction at the first meiotic division. Which of the following sets of gametes would result?

Pachytene occurs during

Which stage of meiosis involves the separation of the centromere?