Assertion: Polytene chromosomes have a high a | vedclass

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(A) Polytene chromosomes are giant chromosomes found in the salivary glands of Drosophila larvae.They are formed through a process called endoreduplic

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

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(A) Polytene chromosomes are giant chromosomes found in the salivary glands of Drosophila larvae.They are formed through a process called endoreduplication or endomitosis,where the $DNA$ replicates repeatedly without the cell dividing.Because of this repeated replication of $DNA$ strands,these chromosomes contain a very high amount of $DNA$ and appear as thick,banded structures.Therefore,the Assertion is correct,and the Reason correctly explains why they have a high amount of $DNA$.

Column-$I$	Column-$II$
$(a)$ Acrocentric	$(p)$ Centromere slightly away from the middle
$(b)$ Telocentric	$(q)$ Centromere in the middle
$(c)$ Submetacentric	$(r)$ Centromere near the end
$(d)$ Metacentric	$(s)$ Centromere at the terminal end

Assertion: Polytene chromosomes have a high amount of $DNA$.
Reason: Polytene chromosomes are formed by repeated replication.

Similar Questions

Match the following columns correctly:
Column-$I$ Column-$II$
$(a)$ Acrocentric $(p)$ Centromere slightly away from the middle
$(b)$ Telocentric $(q)$ Centromere in the middle
$(c)$ Submetacentric $(r)$ Centromere near the end
$(d)$ Metacentric $(s)$ Centromere at the terminal end

Telocentric chromosome differs from acrocentric chromosome in that

Chromatin contains:

$A$ chromosome with a sub-terminal centromere is known as .......

$A$: Chromosomes are responsible for hereditary traits in all living organisms.
$R$: Genes are microscopic structures that contain chromosomes.

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Assertion: Polytene chromosomes have a high amount of $DNA$.Reason: Polytene chromosomes are formed by repeated replication.