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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.
In genetics, a chiasma (pl.: chiasmata) is the point of contact, the physical link, between two (non-sister) chromatids belonging to homologous chromosomes. At a given chiasma, an exchange of genetic material can occur between both chromatids, what is called a chromosomal crossover, but this is much more frequent during meiosis than mitosis.
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-
CHIASMA meaning: 1. an instance of two structures in the body crossing and forming an X, especially the optic…. Learn more.
The point of contact between the homologous pair of chromosomes is called chiasmata. At the point of chiasmata, exchange of chromosomal segment takes place, between the non-sister chromatids of the homologous pairs. Suggest Corrections.
In rhetoric, chiasmus ( / kaɪˈæzməs / ky-AZ-məs) or, less commonly, chiasm (Latin term from Greek χίασμα, "crossing", from the Greek χιάζω, chiázō, "to shape like the letter Χ "), is a "reversal of grammatical structures in successive phrases or clauses – but no repetition of words". [1]
Expertise. Biology. Drawing Chiasmata. Skill: Drawing diagrams to show chiasmata formed by crossing over. Drawing tips. Use two coloured pens/pencils to show chromosomes/chromatids of maternal or paternal origin. One chromosome of each colour makes a homologous pair.
