The salivary gland chromosomes in the diptera | vedclass

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Question

(D) Salivary gland chromosomes,also known as polytene chromosomes,are found in the salivary glands of dipteran larvae (e.g.,$Drosophila$).These chromo

Vedclass · Accepted Answer

They have endoreduplicated chromosomes

Vedclass · Answer

(D) Salivary gland chromosomes,also known as polytene chromosomes,are found in the salivary glands of dipteran larvae (e.g.,$Drosophila$).These chromosomes are formed through a process called endoreduplication,where the $DNA$ undergoes multiple rounds of replication without cell division,resulting in thousands of chromatids aligned side-by-side.This process creates distinct banding patterns (chromomeres) that are visible under a light microscope.Because these banding patterns are constant and specific to certain gene loci,they are extremely useful for cytogenetic gene mapping.

The salivary gland chromosomes in the dipteran larvae are useful in gene mapping because

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