Definition of polytene in English:

polytene

adjective ˈpɒlɪtiːnˈpäləˌtēn

Genetics

Relating to or denoting a giant chromosome which is composed of many parallel copies of the genetic material, as found in Drosophila fruit flies where they are much used in genetic research.
〔遗传〕（染色体）多线性的
Example sentencesExamples
- The structures of rearrangements were defined by mitotic chromosome staining as well as by genetic and polytene chromosome analysis.
- Cytogenetic studies of mitotic and polytene chromosomes, allozyme data, and crossing studies indicate that An. dirus A and C are very closely related.
- Two of those contained repetitive sequence and hybridized to the centromeres of the polytene chromosomes.
- Anopheline mosquitoes, like Drosophila, are renowned for the presence of polytene chromosomes and chromosomal inversions.
- It was mapped in Drosophila by polytene chromosome in situ to 3L heterochromatin.
- This was first recognized more than a half century ago in cytological studies of lampbrush chromosomes in amphibian oocytes and polytene chromosomes in insects.

Origin

1930s: from poly- 'many' + -tene (from Greek tainia 'band, ribbon') denoting stages of the first meiotic division.

Definition of polytene in US English:

polytene

adjectiveˈpäləˌtēn

Genetics

Relating to or denoting a giant chromosome which is composed of many parallel copies of the genetic material, as found in Drosophila fruit flies where they are much used in genetic research.
〔遗传〕（染色体）多线性的
Example sentencesExamples
- Two of those contained repetitive sequence and hybridized to the centromeres of the polytene chromosomes.
- Anopheline mosquitoes, like Drosophila, are renowned for the presence of polytene chromosomes and chromosomal inversions.
- Cytogenetic studies of mitotic and polytene chromosomes, allozyme data, and crossing studies indicate that An. dirus A and C are very closely related.
- This was first recognized more than a half century ago in cytological studies of lampbrush chromosomes in amphibian oocytes and polytene chromosomes in insects.
- The structures of rearrangements were defined by mitotic chromosome staining as well as by genetic and polytene chromosome analysis.
- It was mapped in Drosophila by polytene chromosome in situ to 3L heterochromatin.

Origin

1930s: from poly- ‘many’ + -tene (from Greek tainia ‘band, ribbon’) denoting stages of the first meiotic division.

单词	polytene
释义	Definition of polytene in English: polytene adjective ˈpɒlɪtiːnˈpäləˌtēn Genetics Relating to or denoting a giant chromosome which is composed of many parallel copies of the genetic material, as found in Drosophila fruit flies where they are much used in genetic research. 〔遗传〕（染色体）多线性的 Example sentencesExamples The structures of rearrangements were defined by mitotic chromosome staining as well as by genetic and polytene chromosome analysis. Cytogenetic studies of mitotic and polytene chromosomes, allozyme data, and crossing studies indicate that An. dirus A and C are very closely related. Two of those contained repetitive sequence and hybridized to the centromeres of the polytene chromosomes. Anopheline mosquitoes, like Drosophila, are renowned for the presence of polytene chromosomes and chromosomal inversions. It was mapped in Drosophila by polytene chromosome in situ to 3L heterochromatin. This was first recognized more than a half century ago in cytological studies of lampbrush chromosomes in amphibian oocytes and polytene chromosomes in insects. Origin 1930s: from poly- 'many' + -tene (from Greek tainia 'band, ribbon') denoting stages of the first meiotic division. Definition of polytene in US English: polytene adjectiveˈpäləˌtēn Genetics Relating to or denoting a giant chromosome which is composed of many parallel copies of the genetic material, as found in Drosophila fruit flies where they are much used in genetic research. 〔遗传〕（染色体）多线性的 Example sentencesExamples Two of those contained repetitive sequence and hybridized to the centromeres of the polytene chromosomes. Anopheline mosquitoes, like Drosophila, are renowned for the presence of polytene chromosomes and chromosomal inversions. Cytogenetic studies of mitotic and polytene chromosomes, allozyme data, and crossing studies indicate that An. dirus A and C are very closely related. This was first recognized more than a half century ago in cytological studies of lampbrush chromosomes in amphibian oocytes and polytene chromosomes in insects. The structures of rearrangements were defined by mitotic chromosome staining as well as by genetic and polytene chromosome analysis. It was mapped in Drosophila by polytene chromosome in situ to 3L heterochromatin. Origin 1930s: from poly- ‘many’ + -tene (from Greek tainia ‘band, ribbon’) denoting stages of the first meiotic division.
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