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Question
Polytene chromosomes are formed due to
Polytene chromosomes are formed due to
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Solution
The correct option is D All of the above
- The salivary gland chromosome is also known as polytene chromosomes.
- These chromosomes are found during the interphase stage of the cell division in the nuclei of the salivary gland cells of the larvae of Diptera (fruitfly or Drosophila melanogaster).
- Polytene chromosomes are formed due to endoduplication, duplication without separation and replication of DNA without cell division
- Endoduplication refers to the replication of DNA during the S phase (of the cell cycle) without the completion of cytokinesis.
- These chromosomes undergo somatic pairing to form identical chromosomes which are joined along their length to one another.
- So, the correct answer is 'All of the above'.
- The salivary gland chromosome is also known as polytene chromosomes.
- These chromosomes are found during the interphase stage of the cell division in the nuclei of the salivary gland cells of the larvae of Diptera (fruitfly or Drosophila melanogaster).
- Polytene chromosomes are formed due to endoduplication, duplication without separation and replication of DNA without cell division
- Endoduplication refers to the replication of DNA during the S phase (of the cell cycle) without the completion of cytokinesis.
- These chromosomes undergo somatic pairing to form identical chromosomes which are joined along their length to one another.
- So, the correct answer is 'All of the above'.
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