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chiasma

n. 交叉

交叉

WordNet (r) 3.0 (2006) (WordNet)

chiasma
n 1: an intersection or crossing of two tracts in the form of
the letter X [synonym: {chiasma}, {chiasm}, {decussation}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Chiasm \Chi"asm\ (k[imac]"[a^]z'm), Chiasma \Chi*as"ma\
(k[-i]*[a^]z"m[.a]), n. [NL. chiasma, fr. Gr. chi`asma two
lines placed crosswise, fr. ? to mark with a [chi].] (Anat.)
A commissure; an intersection or crossing of two tracts;
especially, the optic commissure, or crucial union of the
optic nerves. -- {Chi*as"mal}, a..
[1913 Webster] chiasmatic
chiasmal

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英文字典中文字典相关资料:

Chiasma (genetics) - Wikipedia
Chiasma (genetics) Crossing over during meiosis, with chiasma shown In genetics, a chiasma (pl : chiasmata) is the point of contact, the physical link, between two (non-sister) chromatids belonging to homologous chromosomes
Chiasmata- Definition, Formation, Structure, Significances
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 Definition Meaning - Merriam-Webster
The meaning of CHIASMA is an anatomical intersection or decussation
What Is a Chiasma? Formation and Biological Significance
A chiasma (plural: chiasmata) is a point of contact between two non-sister chromatids belonging to homologous chromosomes It physically links these chromosomes during meiosis, a specialized cell division
Chiasma | genetics | Britannica
protoplasm, colorless ground substance of living material within cells, constituting the cytoplasm and organelles of a cell, particularly the nucleus Protoplasm serves as the substance in which all reactions of living cells are carried out, and thus it is essential to all living processes
CHIASMA | definition in the Cambridge English Dictionary
Most of its fibers have their origins in the retina, and reach the chiasma through the optic nerves This is a further study on chiasma distribution in the human male
Chiasmata - BioNinja
Chiasmata are X-shaped points of attachment between two non-sister chromatids of a homologous pair Chiasmata form as a result of crossing over and hence non-sister chromatids should show an exchange of genetic material
CHIASMA definition and meaning | Collins English Dictionary
chiasma in American English (kaɪˈæzmə ) noun Word forms: plural chiasmata (kaɪˈæzmətə ) Origin: ModL < Gr chiasma, a crosspiece < chiasmos, placing crosswise < chiazein, to mark with a chi (χ)
Chiasma - Biology Simple
Chiasma, also known as the optic chiasm, plays a crucial role in our visual system It is a vital intersection point where the optic nerves from both eyes partially cross over, leading to the complex process of vision
Chiasma Definition and Examples - Biology Online Dictionary
Chiasma in the largest biology dictionary online Free learning resources for students covering all major areas of biology

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