Chiasmata- Definition, Formation, Structure, Significances
网页2023年8月3日 · 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.
Chiasma (genetics) - Wikipedia
网页In genetics, a chiasma (pl.: chiasmata) is the point of contact, the physical link, between two (non-sister) chromatids belonging to homologous chromosomes.
Meiosis – Introductory Biology: Evolutionary and Ecological …
网页At the end of prophase I, the pairs are held together only at chiasmata (Figure 1) and are called tetrads because the four sister chromatids of each pair of homologous chromosomes are now visible. The crossover events are the first source of …
Chiasmata - Vocab, Definition, and Must Know Facts - Fiveable
网页Chiasmata are the points where homologous chromosomes exchange genetic material during meiosis. They are crucial for genetic variation and proper chromosome segregation.
Chiasmata - an overview | ScienceDirect Topics
网页Chiasmata are specialized chromatin structures that link homologous chromosomes together until anaphase I (Figs. 45.1 and 45.10). They form at sites where programmed DNA breaks generated by Spo11 undergo the full recombination pathway to generate crossovers.
Chiasma | genetics | Britannica
网页chiasma. genetics. Also known as: chiasmata. Learn about this topic in these articles: genetic linkage and crossing over. In heredity: Simple linkage. Furthermore, Morgan perceived that the chiasmata (crosses that occur in meiotic chromosomes) indicate the mechanism underlying the phenomena of linkage and crossing over.
Chiasmata Definition & Meaning - Merriam-Webster
网页chiasma. noun. chi· as· ma kī-ˈaz-mə, kē-. plural chiasmata -mət-ə. 1. : an anatomical intersection or decussation see optic chiasma. 2. : a cross-shaped configuration of paired chromatids visible in the diplotene of meiotic prophase and considered the cytological equivalent of genetic crossing-over. chiasmatic.
Chiasma - Oxford Reference
网页2024年9月17日 · (pl. chiasmata) The point at which paired homologous chromosomes remain in contact as they begin to separate during the first prophase of meiosis, forming a cross shape. A number of chiasmata can usually …
Chiasma - Encyclopedia.com
网页2018年5月18日 · 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.
Chiasmata in Meiosis | Cell Cycle - YouTube
网页Chiasmata in Meiosis is explained in this viseo lesson. The chiasma is a structure that physically links the homologous chromosomes during meiosis.#chiasmata...