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Cross-shaped configuration of paired chromatids
- : a cross-shaped configuration of paired chromatids visible in the diplotene of meiotic prophase and considered the cytological equivalent of genetic crossing-over
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noun. chi· as· ma kī-ˈaz-mə. kē- plural chiasmata kī-ˈaz-mə-tə. kē- 1. : an anatomical intersection or decussation compare optic chiasma. 2. : a cross-shaped configuration of paired chromatids visible in the diplotene stage of meiotic prophase and considered the cytological equivalent of genetic crossing-over. chiasmatic. ˌkī-əz-ˈma-tik. ˌkē-
In neuroanatomy, the optic chiasm, or optic chiasma ( / ɒptɪk kaɪæzəm /; from Greek χίασμα 'crossing', from Ancient Greek χιάζω 'to mark with an X '), is the part of the brain where the optic nerves cross. It is located at the bottom of the brain immediately inferior to the hypothalamus. [1] .
- chiasma opticum
- D009897
- Transmit visual information from the optic nerves to the occipital lobes of the brain
- Visual system
Kiasma is a contemporary art museum located on Mannerheimintie in Helsinki, Finland. Its name kiasma, Finnish for chiasma, alludes to the basic conceptual idea of its architect, Steven Holl. Kiasma is part of the Finnish National Gallery, and it is responsible for the gallery's contemporary art collection.
- 1990 (Museum of Contemporary Art), 1998 (opening of Kiasma building)
- Finnish National Gallery
- 295,000 (2017)
May 18, 2018 · chiasma (pl. chiasmata) In genetics, a cross-shaped structure forming the points of contact between non-sister chromatids of homologous chromosomes, first seen in the tetrads of the diplotene stage of meiotic prophase I. Chiasmata are thus the visible expression of crossing-over of genes.
Aug 3, 2023 · Chiasmata (singular: chiasma, from the Greek, meaning “X-shaped cross”) is the point of contact that occurs in the Prophase I pachytene phase and links two non-sister chromatids belonging to homologous chromosomes together until Anaphase I of meiosis I cell division.
noun. , plural chi·as·mas, chi·as·ma·ta [kahy-, az, -m, uh, -t, uh]. Anatomy. a crossing or decussation, as that of the optic nerves at the base of the brain. Cell Biology. a point of overlap of paired chromatids at which fusion and exchange of genetic material take place during prophase of meiosis. chiasma. / kaɪˈæzmə; ˈkaɪæzəm / noun.
4 days ago · an intersection or crossing of two tracts in the form of the letter X.
