The synaptonemal complex forms between homologous chromosomes during meiosis and mediates chromosome pairing, synapsis, and recombination. It is a tripartite structure consisting of two parallel axes and a central element. Lampbrush chromosomes occur during oogenesis and are very large, with chromatin loops projecting from the chromosome axes that resemble the wick of a kerosene lamp, giving them their name. Lampbrush chromosomes are highly active in gene expression, with most genes in the chromatin loops being actively transcribed.

3.  The synaptonemal complex (SC) is a structure that
forms between homologous chromosomes (two pairs of
) during and is thought to mediate
chromosome pairing, , and .
 The paired homologous chromosomes are joined by a protein
containing frame work called .

4. Synapsis
 The first unique feature of meiosis happens early
during the first nuclear division.
 Following chromosome replication, homologous
chromosomes, or homologues pair all along their length.
 The process of forming these complexes of homologous
chromosomes is called

5.  The synaptonemal complex was described by
in 1956 in primary
spermatocytes of crayfish and by in
spermatocytes of pigeon, cat and man.
 The synaptonemal complex is a tripartite structure
consisting of two parallel and a
.
 Three specific components of the synaptonemal
complex have been characterized:
(SYCP1), (SYCP2), and
(SYCP3).

10.  First observed by in 1882.
 The name lampbrush was given by
in 1892.
 It is the known and is
found in the (immature
eggs).
 Also seen in diplotene in
.

11.  Lampbrush chromosomes occur during the
.
 They are , each consisting of
two pairs of .
 Lampbrush chromosomes are so called
because the chromosomes seem to have a
chromomeric pattern with loops projecting in
pair from majority of chromosomes and
, that were used for
cleaning glass chimneys of kerosene lamps.

15. The meiotically paired
chromosomes in growing
amphibian oocytes are
highly active in gene
expression, and they form
unusually stiff and
extended chromatin loops.
Experiments demonstrate
that most of the genes
present in the DNA loops
are being actively
expressed.