chiasma

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Related to chiasmatic: Chiasmatic cistern, chiasmata, Chiastic, Chiasmatic groove

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 ?
Most of the homoeologous pairing at metaphase I in wheat-rye hybrids is not chiasmatic.
As Bhabha says, "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.
2) In the shadow of the Hollywood sign, what is the difference between an appropriation and a remake, given that the remake is an industry standard, for better (Douglas Sirk's daunting Imitation of Life) or worse (Jim McBride's anemic Breathless), producing indifference (Steven Soderbergh's empty Ocean's II) or grandiose inanity (Cameron Crowe's chiasmatic Vanilla Sky)?
7-15] Presenting symptoms of thyroid carcinoma metastatic to pituitary gland include chiasmatic and central neurological impairment,[7,8,10-13] as well as hypopituitarism,[9,11,14] including diabetes insipidus.
The design is chiasmatic, both in the formal sense of the term and in the Black vernacular tradition of repetition and reversal.
Pneumosinus dilatans and hyperostosis: Early signs of meningiomas of the anterior chiasmatic angle.
Only by accepting some form of cultural schizophrenia--indeed, a chiasmatic sense of self--can Peter begin to negotiate his way out of the stifling inheritance of the angloceltic middle classes.
In isolating the brushstroke and the drip as chiasmatic figures through which abstraction and representation inevitably cross, Steir has focused with greater concentration on an issue that is also of considerable moment for a younger generation of artists like Fabian Marcaccio and Carl Ostendarp.