In which stage of meiosis do the sister chromatids of two cells move towards opposite poles via spindle fibers?

During synapsis,how many chromatids are present in each bivalent (tetrad)?

Which of the following processes does not occur in mitosis?

Synapsis occurs between which of the following?

The diplotene phase of meiosis is also characterised by:
$a$. Desynapsis
$b$. Complete terminalisation of chiasmata
$c$. Dictyotene stage
$d$. Complete disappearance of nuclear membrane and nucleoli
$e$. Complete development of astral rays and aster
$f$. Longest phase of prophase-$I$

Crossing over takes place at a stage between