Polytene chromosomes in salivary glands are f | vedclass

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Question

(D) Polytene chromosomes are giant chromosomes formed by the process of endoreduplication or endomitosis.In this process,the $DNA$ undergoes repeated

Vedclass · Accepted Answer

All of the above

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(D) Polytene chromosomes are giant chromosomes formed by the process of endoreduplication or endomitosis.In this process,the $DNA$ undergoes repeated rounds of replication without the subsequent division of the cell or the nucleus.This results in the formation of many parallel chromatids (strands) within a single chromosome,which is why they are called polytene (many-stranded).Since endoduplication,duplication without separation,and replication of $DNA$ without cell division describe the same phenomenon,all the given options are correct.

Column-$I$	Column-$II$
$i$. $G_1$ phase	$P$. Production of proteins and microtubules
$ii$. $S$ phase	$Q$. Karyokinesis and cytokinesis
$iii$. $G_2$ phase	$R$. $1^{st}$ phase of interphase
$iv$. $M$ phase	$S$. Synthesis of $DNA$

Polytene chromosomes in salivary glands are formed as a result of:

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Column-$I$ Column-$II$
$i$. $G_1$ phase $P$. Production of proteins and microtubules
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