chiasma

简明释义

英[kaɪˈæzmə]美[kaɪˈæzmə]

n. 交叉；视神经交叉

复 数 c h i a s m a t a 或 c h i a s m a s

英英释义

单词用法

同义词

反义词

例句

1.Today, with the changing quickly computer technology and in-depth subjects chiasma, the traditional safety monitoring work is being endowed with much more new content.

在计算机技术日新月异，学科交叉日趋深入的今天，传统的安全监测工作正被赋予更多新的内容。

2.The small branches seen anteriorly to optic chiasma in the chiasmatic cistern were almost always the branches of superior hypophyseal artery.

在视交叉池内，垂体柄前方所见的小动脉几乎均属于垂体上动脉的分支。

3.The results indicated that both the number of rod bivalents and the number of pre-division bivalents increased markedly after radiation, while the number of bivalent chiasma tended to decrease.

结果表明，照射后棒状二价体数明显上升，二价体提前分离增多，而二价体的交叉数却呈下降趋势。

4.Results Orbit tumor of a 21 year old young lady extends the encephalic and endangers the olfactory nerve and optic chiasma, even cause olfaction and visual acuity to be declined.

结果1例2 1岁女性患者，眼眶肿瘤侵入颅内损伤嗅神经及视交叉，引起嗅觉及视力下降。

5.Objective To provide morphological evidences for visual field defects caused by the compression of optic nerves and optic chiasma by saddle area tumors.

目的为脑底肿瘤压迫视神经、视交叉引起视野缺损原因提供形态学依据。

6.It is of the first magnitude to strictly manage the yellow route of the section of a highway, especially at chiasma.

严格公路黄色安全线尤其是交叉路段的管理，是保障交通安全通畅的重要前提之一。

7.No difference was observed in chromosomal number, relative length and chiasma location.

染色体数目、相对长度和着丝点位置均无明显区别。

8.Conclusion The compression of optic nerves and optic chiasma is responsible for different types of visual field defects caused by saddle area tumors.

结论颅底肿物引起不同类型的视野缺损的原因与压迫视神经、视交叉相关。

9.The results indicated that both the number of rod bivalents and the number of pre-division bivalents increased markedly after radiation, while the number of bivalent chiasma tended to decrease.

结果表明，照射后棒状二价体数明显上升，二价体提前分离增多，而二价体的交叉数却呈下降趋势。

10.Researchers studied the chiasma 交叉体 formation in fruit flies to understand genetic diversity.

研究人员研究了果蝇中的chiasma 交叉体 形成，以了解遗传多样性。

11.The study of chiasma 交叉体 formation can provide insights into certain genetic disorders.

对chiasma 交叉体 形成的研究可以提供对某些遗传疾病的见解。

12.The presence of a chiasma 交叉体 indicates that homologous chromosomes are exchanging genetic material.

存在一个chiasma 交叉体 表明同源染色体正在交换遗传物质。

13.During meiosis, the formation of a chiasma 交叉体 is crucial for genetic recombination.

在减数分裂过程中，chiasma 交叉体 的形成对于遗传重组至关重要。

14.In genetics, the term chiasma 交叉体 refers to the point where two chromosomes exchange segments.

在遗传学中，术语chiasma 交叉体 指的是两个染色体交换片段的点。

作文

In the field of genetics, the term chiasma refers to the point where two homologous chromosomes exchange genetic material during meiosis. This process is crucial for genetic diversity, as it allows for the mixing of parental genes and contributes to the variation seen in offspring. The formation of a chiasma occurs during prophase I of meiosis when homologous chromosomes pair up and align closely along their lengths. The physical connection formed at this point enables the exchange of segments of DNA between the chromatids of the paired chromosomes.Understanding the significance of chiasma is essential for grasping how traits are inherited and how populations evolve over time. Without this genetic recombination, the genetic variation necessary for natural selection would be severely limited. Each chiasma represents a unique opportunity for variation, and the more chiasmata that form, the greater the potential for diverse traits within a population.Furthermore, the study of chiasma has implications beyond basic genetics. It plays a role in understanding certain genetic disorders and diseases. For example, errors in the formation or resolution of chiasmata can lead to chromosomal abnormalities, which may result in conditions such as Down syndrome or Turner syndrome. Researchers are continually investigating the mechanisms behind chiasma formation and its impact on human health.In a broader context, the concept of chiasma can also be metaphorically applied to various fields, including literature and art. In literature, a chiasma can refer to a rhetorical device where two or more clauses are related to each other through a reversal of structures in a sentence. This creates a mirror effect, enhancing the meaning and aesthetic of the text. For instance, the famous quote 'Never let a Fool Kiss You or a Kiss Fool You' employs this technique effectively, creating a memorable and impactful statement.Art too has its own forms of chiasma. Artists often use contrasting elements to create balance and harmony within their works. By juxtaposing different themes, colors, or techniques, they can evoke emotions and provoke thought, similar to how genetic chiasmata create diversity in biological systems. In conclusion, the term chiasma encompasses a variety of meanings and applications, from its critical role in genetics to its metaphorical use in literature and art. The ability to recognize and appreciate the function of chiasma in these different contexts enriches our understanding of both biology and culture. As we continue to explore the intricacies of genetics and the beauty of artistic expression, the concept of chiasma serves as a reminder of the interconnectedness of all things, illustrating how diversity and complexity are fundamental to life itself.

在遗传学领域，“chiasma”一词指的是在减数分裂过程中，两条同源染色体交换遗传物质的点。这个过程对遗传多样性至关重要，因为它允许父母基因的混合，并有助于后代中观察到的变异。“chiasma”的形成发生在减数分裂的前期I阶段，当同源染色体配对并沿其长度紧密排列时。在这一点上形成的物理连接使得配对染色体的姐妹染色单体之间能够交换DNA片段。理解chiasma的重要性对于掌握特征的遗传以及种群如何随时间演变是必不可少的。如果没有这种遗传重组，自然选择所需的遗传变异将受到严重限制。每一个chiasma都代表着一个独特的变异机会，而形成的chiasmata越多，种群中潜在的多样性特征就越大。此外，研究chiasma还超越了基础遗传学，涉及某些遗传疾病和病症的理解。例如，chiasmata的形成或解离中的错误可能导致染色体异常，这可能导致唐氏综合症或特纳综合症等疾病。研究人员正在不断调查chiasma形成背后的机制及其对人类健康的影响。在更广泛的背景下，chiasma的概念也可以隐喻性地应用于各个领域，包括文学和艺术。在文学中，chiasma可以指一种修辞手法，其中两个或多个子句通过句子结构的反转彼此关联。这种镜像效果增强了文本的意义和美感。例如，著名的名言“永远不要让傻瓜吻你，或者让吻愚弄你”有效地运用了这一技巧，创造了一个令人难忘且影响深刻的陈述。艺术也有自己的chiasma形式。艺术家经常使用对比元素来在作品中创造平衡与和谐。通过并置不同的主题、颜色或技巧，他们能够唤起情感和引发思考，这类似于遗传chiasmata在生物系统中创造多样性。总之，术语chiasma涵盖了多种含义和应用，从其在遗传学中的关键角色到其在文学和艺术中的隐喻使用。能够识别和欣赏chiasma在这些不同背景中的功能丰富了我们对生物学和文化的理解。当我们继续探索遗传学的复杂性和艺术表达的美丽时，chiasma的概念提醒我们所有事物之间的相互联系，说明多样性和复杂性是生命本身的基本特征。