parasyndesisn.
/ˌparəsɪnˈdiːsɪs/, /ˌparəˈsɪndᵻsɪs/, U.S. /ˌpɛrəˈsɪndəsəs/, /ˌpɛrəˌsɪnˈdisᵻs/ Cell Biology. Now rare or disused.
Side-by-side pairing of chromosomes at meiosis; = parasynapsis n. Cf. metasyndesis n.
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
1911 Jrnl. Morphol. 22 754 The main difference between the views of parasyndesis and metasyndesis lies in the interpretation of the longitudinal cleft of the gemini.
1912 Jrnl. Exper. Zool. 13 392 Do they [sc. the chromatin-elements] conjugate side by side (parasynapsis, parasyndesis), end to end (telosynapsis, metasyndesis) or in both ways?
1925 E. B. Wilson Cell (ed. 3) vi. 508 Evidence has steadily accumulated to show that in a large class of cases synapsis involves a side-by-side union of the synaptic mates (parasynapsis or parasyndesis) instead of an end-to-end union..as was formerly supposed.
Derivatives
parasynˈdetically adv. rare
ΘΚΠ
the world > life > biology > biological processes > genetic activity > [adverb] > other processes
parasynaptically1910
parasyndetically1911
tandemly1968
1911 Jrnl. Morphol. 22 750 The chromosomes conjugate parasyndetically.
1929 Jrnl. Genetics 19 171 She found a continuous spireme composed of parasyndetically paired threads alternating with single ones.
This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).
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n.1911