polytenicadj.

Brit.

/ˌpɒlɪˈtiːnɪk/, U.S.

/ˌpɑliˈtinɪk/

Origin: Formed within English, by derivation. Etymons: poly- comb. form, -tene comb. form, -ic suffix.

Etymology: < poly- comb. form + -tene comb. form + -ic suffix. Compare earlier synaptenic adj. and polytene adj.

Cell Biology.

= polytene adj.

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

1952 Amer. Naturalist 86 124 The salivary nuclei show a peculiar structural condition. Polytenic structure appears only if the food is rich in amino acid and fats.

1960 E. D. P. De Robertis et al. Gen. Cytol. (ed. 3) xii. 317 By the process of endomitosis, without cell division, the DNA may increase as much as 1000 times in polytenic chromosomes.

1976 P. Bell & D. Coombe tr. Strasburger's Textbk. Bot. (new ed.) 31 In rare cases repeated multiplication of chromonemata leads to multistranded (polytenic), cable-like, giant chromosomes.

2001 Proc. National Acad. Sci. U.S.A. 98 6273/1 The smallest [autosome]..consists of a centromeric, highly condensed region that is underreplicated in polytenic tissues and a banded, polytenized region.

This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).

单词	polytenic
释义	polytenicadj. Brit. /ˌpɒlɪˈtiːnɪk/, U.S. /ˌpɑliˈtinɪk/ Origin: Formed within English, by derivation. Etymons: poly- comb. form, -tene comb. form, -ic suffix. Etymology: < poly- comb. form + -tene comb. form + -ic suffix. Compare earlier synaptenic adj. and polytene adj. Cell Biology. = polytene adj. 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 1952 Amer. Naturalist 86 124 The salivary nuclei show a peculiar structural condition. Polytenic structure appears only if the food is rich in amino acid and fats. 1960 E. D. P. De Robertis et al. Gen. Cytol. (ed. 3) xii. 317 By the process of endomitosis, without cell division, the DNA may increase as much as 1000 times in polytenic chromosomes. 1976 P. Bell & D. Coombe tr. Strasburger's Textbk. Bot. (new ed.) 31 In rare cases repeated multiplication of chromonemata leads to multistranded (polytenic), cable-like, giant chromosomes. 2001 Proc. National Acad. Sci. U.S.A. 98 6273/1 The smallest [autosome]..consists of a centromeric, highly condensed region that is underreplicated in polytenic tissues and a banded, polytenized region. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < adj.1952
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