chiasma
chiasma
[kʌɪˈazmə, kɪ-]
(pl. chiasmata -tə)
[kʌɪˈazmə, kɪ-]
(pl. chiasmata -tə)
- (Biology)a point at which paired chromosomes remain in contact during the first metaphase of meiosis, and at which crossing over and exchange of genetic material occur between the strands. optic chiasma
(生)（染色体）交叉。 参见 optic chiasma - (also optic chiasma)(Anatomy)the X-shaped structure formed at the point below the brain where the two optic nerves cross over each other
- mid 19th cent.: modern Latin, from Greek chiasma 'crosspiece, cross-shaped mark', from khiazein 'mark with the letter chi'
热门查询
- circs n.事情，事件，情况
- circuit n.电路，线路,巡回,唤醒，环形道,〔电〕电流 vt.巡回，周游
- circuitous adj.迂回的，绕行的,萦纡,迂曲
- circuitously 曲折地
- circuitousness 弯曲，环绕
- circuitry n.电路，线路,电路图
- circuity n.迂回，绕行
- circular adj.圆形的,环行的,迂回的，绕行的,供传阅的，流通的 n.通知，通告,印制的广告，传单
- circularise vt.< 主英>分发传单,通知,分发民意测验单,传阅
- circularity n.圆,循环性,环状,充实度
- circularize vt.分发传单,通知,分发民意测验单,传阅
- circularly adv.圆地，循环地
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