lampbrushn.

/ˈlampbrʌʃ/

Forms: Also (with hyphen) lamp-brush.

Etymology: representing German lampencylinderputzer lit. ‘lamp-glass cleaner’, to which lampbrush chromosomes were likened by J. Rückert (in Anatomischer Anzeiger (1892) VII. 115): see lamp n.¹ and brush n.²

Cytology.

Used attributively to designate chromosomes having numerous paired lateral projections or loops, which loops are usually apparent only during diplotene in a few groups of animals and give the whole chromosome the appearance of a bottle-brush.

ΘΚΠ

the world > life > biology > biological processes > genetic activity > genetic components > [adjective] > chromosome > types of chromosome

supernumerary1907

autosomal1911

lampbrush1911

trisomic1921

hexasomic1922

tetrasomic1922

monosomic1926

polytene1935

polytenic1952

polysomal1962

polytenized1974

1901 Jrnl. Royal Microsc. Soc. 135 This large nucleolus then breaks up..with the production of ‘bottle-brush’ and plumose figures in the caryoplasm.]

1911 Jrnl. Royal Microsc. Soc. 456 The formation of the curious ‘lamp-brush’ chromosomes.

1925 E. B. Wilson Cell (ed. 3) iv. 350 Thus are the very loose so-called ‘lamp-brush’ chromosomes.., characteristic of the middle growth-period in large, yolk-bearing eggs.

1940 Proc. National Acad. Sci. U.S.A. 26 344 The typical lamp~brush chromosomes of the ovocytes of lower vertebrates.

1965 A. R. Peacocke & R. B. Drysdale Molecular Basis Heredity vii. 72 In the newt, Triturus cristatus, large diplotene chromosomes may be isolated from oocytes and maintained for several days in buffer. These ‘lampbrush chromosomes’ are sufficiently large for the action of enzymes on the chromosomes to be studied microscopically. Evidence obtained from this material supports the conclusion that chromosomes contain protein, RNA and DNA.

This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2020).

单词	lampbrush
释义	lampbrushn. /ˈlampbrʌʃ/ Forms: Also (with hyphen) lamp-brush. Etymology: representing German lampencylinderputzer lit. ‘lamp-glass cleaner’, to which lampbrush chromosomes were likened by J. Rückert (in Anatomischer Anzeiger (1892) VII. 115): see lamp n.¹ and brush n.² Cytology. Used attributively to designate chromosomes having numerous paired lateral projections or loops, which loops are usually apparent only during diplotene in a few groups of animals and give the whole chromosome the appearance of a bottle-brush. ΘΚΠ the world > life > biology > biological processes > genetic activity > genetic components > [adjective] > chromosome > types of chromosome supernumerary1907 autosomal1911 lampbrush1911 trisomic1921 hexasomic1922 tetrasomic1922 monosomic1926 polytene1935 polytenic1952 polysomal1962 polytenized1974 1901 Jrnl. Royal Microsc. Soc. 135 This large nucleolus then breaks up..with the production of ‘bottle-brush’ and plumose figures in the caryoplasm.] 1911 Jrnl. Royal Microsc. Soc. 456 The formation of the curious ‘lamp-brush’ chromosomes. 1925 E. B. Wilson Cell (ed. 3) iv. 350 Thus are the very loose so-called ‘lamp-brush’ chromosomes.., characteristic of the middle growth-period in large, yolk-bearing eggs. 1940 Proc. National Acad. Sci. U.S.A. 26 344 The typical lamp~brush chromosomes of the ovocytes of lower vertebrates. 1965 A. R. Peacocke & R. B. Drysdale Molecular Basis Heredity vii. 72 In the newt, Triturus cristatus, large diplotene chromosomes may be isolated from oocytes and maintained for several days in buffer. These ‘lampbrush chromosomes’ are sufficiently large for the action of enzymes on the chromosomes to be studied microscopically. Evidence obtained from this material supports the conclusion that chromosomes contain protein, RNA and DNA. This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2020). < n.1911
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