Synaptonemal complex is characteristic of ......

Describe the following:
$(a)$ Synapsis
$(b)$ Bivalent
$(c)$ Chiasmata
Draw a diagram to illustrate your answer.

Select the correct option for a chromosome in Anaphase-$II$ regarding the number of centromeres,chromatids,and kinetochores.

$A$ type of cell division which reduces the chromosome number to half is

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-$I$

In oocytes,which stage can last for months or years,since at this stage the chromosomes decondense and are engaged in $RNA$ synthesis?