chiasma

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chiasma

(kīăz`mə): see crossing overcrossing over,
process in genetics by which the two chromosomes of a homologous pair exchange equal segments with each other. Crossing over occurs in the first division of meiosis. At that stage each chromosome has replicated into two strands called sister chromatids.
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chiasma

[kī′az·mə]
(anatomy)
A cross-shaped point of intersection of two parts, especially of the optic nerves.
(cell and molecular biology)
The point of junction and fusion between paired chromatids or chromosomes, first seen during diplotene of meiosis.
References in periodicals archive ?
Accordingly, the relationship between voice and sense (the signified or meaning) is zeugmatic, aporetic and chiasmatic and hence is not reducible to a dialectical relation with voice/ cry as the meaningless vector or carrier of meaning.
On the surface, Bhabha would probably endorse the subversive potential of what he might call a "chiasmatic" space of writing, one that can "inscribe the ambivalent and chiasmatic intersections of .
9) Mediating between these two chiasmatic temporal trajectories in both of these films, meanwhile, is the figure of the Chinese emperor--with Lau's Chinese Odyssey featuring the Ming dynasty Zhengde emperor (reigned 1506-1521), and Feng's Big Shot's Funeral foregrounding the figure of the young Xuantong emperor, Pu Yi (reigned 1908-1912) who had the dubiou s distinction of being China's "last emperor.
By thinking the relationship between gender and sexuality as "situational, not universal" (to use Rubin's phrase), this essay demonstrates the chiasmatic relation of gender and sexuality in the 1790s' "rights of woman" debates in which the gender of sexuality and the sexuality of gender produce a "truth of sex" at the heart of both sexual difference and heterosexuality.
The native body is fixed at the chiasmatic center of Catlin's canvas, which is the conceptual crux of national disavowal and identification.
We need another time of writing that will be able to inscribe the ambivalent and chiasmatic intersections of time and place that constitute the problematic modern experience of the Western nation Bhabha (1994, 141)
The chiasmatic themes of architecture as frozen music and music as singing the architecture of the world run as leitmotifs through the histories of philosophy, music, and architecture.
Opponent and partner both" because the struggle follows a chiasmatic scheme between "The Eastern They's, the Western We's" whose sounds articulate the criss-crossing scheme of the bridge-table but also remind us that East and West are partners against North and South.
Indeed, some scholars have seen a chiasmatic structure in several of Poe's prose works, and this certainly seems true of Pym, for instance.
Arteaga has a sharp critical eye that ranges easily from the heterotextuality of contemporary chicano poetry to the chiasmatic gender crossings of Sor Juana's prose, from detailed postcolonial analyses to broader polemical essays, poems, and letter fragments.
With problems of chromosome idenfication come problems of distinguishing chiasmatic MI association from achiasmatic (= secondary) association.
Accordingly Thomas's foxes are not left to bark clear and cold on the hills but do so in chiasmatic relation to the child as herdsman (Tindall 270), while the running, loveliness, and watery pleasures take place "all the sun long" (19), a variant of "all day long" that distractingly interposes Thomas's verbal trickery between the reader and the subject.