Chiasma Definition & Meaning - Merriam-Webster
The meaning of CHIASMA is an anatomical intersection or decussation.
Chiasmata- Definition, Formation, Structure, Significances
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 …
Chiasmata - an overview | ScienceDirect Topics
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.
In Genetics, what is a Chiasma? - AllTheScience
2024年5月21日 · A chiasma is a point of contact between sister chromatids that forms during meiosis, a process of cell division and replication used by a wide variety of organisms. At the chiasma, the chromatids can exchange genetic information, resulting in new combinations of genetic material.
Neuroanatomy, Optic Chiasm - StatPearls - NCBI Bookshelf
2023年5月1日 · The optic chiasm, or optic chiasma, is the part of the brain where the optic nerves cross and is therefore of primary importance to the visual pathway. It is located at the base of the brain inferior to the hypothalamus, and approximately 10 mm superior to the pituitary gland within the suprasellar cistern.
Chiasma Definition and Examples - Biology Online Dictionary
2023年5月29日 · ChiasmaThe point of contact between paired chromatids during meiosis, resulting in a cross-shaped configuration and representing the cytological manifestation of crossing over like the letter X. You will also like... A typical eukaryotic cell is comprised of cytoplasm with different organelles, such as nucleus, endoplasmic reticulum, G..
Chiasma (plural chiasmata) - SpringerLink
2016年1月1日 · Chiasmata take place as the bivalents represent 4 strands (chromatids). In about 6–10% of the X chromosomes there are no chiasmata, whereas 60–65% of the bivalents display one, and 30–35% show two, but a higher number of chiasmata is very rare.
Chiasmata Promote Monopolar Attachment of Sister Chromatids …
2011年3月10日 · The chiasma is a structure that forms between a pair of homologous chromosomes by crossover recombination and physically links the homologous chromosomes during meiosis. Chiasmata are essential for the attachment of the homologous chromosomes to opposite spindle poles (bipolar attachment) and their subsequent segregation to the opposite …
CHIASMA | definition in the Cambridge English Dictionary
CHIASMA meaning: 1. an instance of two structures in the body crossing and forming an X, especially the optic…. Learn more.
Chiasma function - ScienceDirect
1994年7月1日 · Chiasmata and Chromosome Segregation Chiasmata have long been recognized to be a regular feature of meiosis, and eventually we have come to agreement about their nature: they are the result of prior crossing over between homologous chromatids (Figure 1). There are several important points to note.
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