What does polytene chromosome mean?

Definitions for polytene chromosome
po·ly·tene chro·mo·some

This dictionary definitions page includes all the possible meanings, example usage and translations of the word polytene chromosome.

Wikipedia

  1. Polytene chromosome

    Polytene chromosomes are large chromosomes which have thousands of DNA strands. They provide a high level of function in certain tissues such as salivary glands of insects.Polytene chromosomes were first reported by E.G.Balbiani in 1881. Polytene chromosomes are found in dipteran flies: the best understood are those of Drosophila, Chironomus and Rhynchosciara. They are present in another group of arthropods of the class Collembola, a protozoan group Ciliophora, mammalian trophoblasts and antipodal, and suspensor cells in plants. In insects, they are commonly found in the salivary glands when the cells are not dividing. They are produced when repeated rounds of DNA replication without cell division forms a giant chromosome. Thus polytene chromosomes form when multiple rounds of replication produce many sister chromatids which stay fused together. Polytene chromosomes, at interphase, are seen to have distinct thick and thin banding patterns. These patterns were originally used to help map chromosomes, identify small chromosome mutations, and in taxonomic identification. They are now used to study the function of genes in transcription.

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Numerology

  1. Chaldean Numerology

    The numerical value of polytene chromosome in Chaldean Numerology is: 4

  2. Pythagorean Numerology

    The numerical value of polytene chromosome in Pythagorean Numerology is: 2

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"polytene chromosome." Definitions.net. STANDS4 LLC, 2024. Web. 28 Apr. 2024. <https://www.definitions.net/definition/polytene+chromosome>.

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