† syndesisn.

/sɪnˈdiːsɪs/

Etymology: < German syndesis (V. Häcker 1904, in Zool. Jahrb. VII. 200), < Greek συν- syn- prefix + δέσις binding together ( < δεσμός bond, connection).

Cytology. Obsolete.

The pairing of chromosomes in mitosis or meiosis. Cf. synapsis n. 2.

ΘΚΠ

the world > life > biology > biological processes > genetic activity > [noun] > other processes in mitosis or meiosis

zonation1899

diakinesis1902

parasynapsis1909

syndesis1909

parasyndesis1911

non-disjunction1913

non-conjunction1925

asynapsis1930

stathmokinesis1938

misdivision1939

metakinesis1948

tandem duplication1959

1909 Ann. Bot. 23 49 Haecker has proposed the word Syndesis to apply to the conjugation or association of the homologous parental chromosomes.

1912 Jrnl. Exper. Zool. 13 348 A number of writers have suggested that the term synapsis..should be abandoned in favour of some less ambiguous word (such as Haecker's term ‘syndesis’) because it has so frequently been applied to the contraction-figure (‘synizesis’ of McClung). I am, however, in favor of the retention of the word, for the ambiguity has arisen simply through a misunderstanding of Moore's meaning. He applied the term ‘synaptic phase’, or ‘synapsis’, to the series of changes following the last diploid division..in the course of which the apparent number of chromosomes is reduced to one-half.

1925 E. B. Wilson Cell (ed. 3) vi. 503 It is now widely held that reduction is initiated by a preliminary process or synapsis or syndesis in the course of which the chromosomes conjugate.

This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2021).

单词	syndesis
释义	† syndesisn. /sɪnˈdiːsɪs/ Etymology: < German syndesis (V. Häcker 1904, in Zool. Jahrb. VII. 200), < Greek συν- syn- prefix + δέσις binding together ( < δεσμός bond, connection). Cytology. Obsolete. The pairing of chromosomes in mitosis or meiosis. Cf. synapsis n. 2. ΘΚΠ the world > life > biology > biological processes > genetic activity > [noun] > other processes in mitosis or meiosis zonation1899 diakinesis1902 parasynapsis1909 syndesis1909 parasyndesis1911 non-disjunction1913 non-conjunction1925 asynapsis1930 stathmokinesis1938 misdivision1939 metakinesis1948 tandem duplication1959 1909 Ann. Bot. 23 49 Haecker has proposed the word Syndesis to apply to the conjugation or association of the homologous parental chromosomes. 1912 Jrnl. Exper. Zool. 13 348 A number of writers have suggested that the term synapsis..should be abandoned in favour of some less ambiguous word (such as Haecker's term ‘syndesis’) because it has so frequently been applied to the contraction-figure (‘synizesis’ of McClung). I am, however, in favor of the retention of the word, for the ambiguity has arisen simply through a misunderstanding of Moore's meaning. He applied the term ‘synaptic phase’, or ‘synapsis’, to the series of changes following the last diploid division..in the course of which the apparent number of chromosomes is reduced to one-half. 1925 E. B. Wilson Cell (ed. 3) vi. 503 It is now widely held that reduction is initiated by a preliminary process or synapsis or syndesis in the course of which the chromosomes conjugate. This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2021). < n.1909
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