diakinesis

简明释义

英[/ˌdaɪəˈkɪnəsɪs/]美[/ˌdaɪəˈkɪnəsɪs/]

n. （细胞减数分裂）终变期

复 数 d i a k i n e s e s

英英释义

单词用法

同义词

反义词

例句

1.Nucleolus disappeared, but some plants in the early diakinesis nucleolus remains high.

核仁消失，但有的植物在终变期的早期核仁仍然很大。

2.Prophase may be divided into successive stages termed leptotene, zygotene, pachytene, diplotene, and diakinesis.

前期可被分为连续的阶段：细线期、偶线期、粗线期、双线期和终变期。

3.During diakinesis the sister chromatids of homologous pairs of chromosomes complete their separation and the chromosomes coil tightly shortening and thickening.

在终变期配对的同源染色体中的姐妹染色单体完成分离，染色体变成紧密凝集的状态，缩至最小长度。

4.During diakinesis the sister chromatids of homologous pairs of chromosomes complete their separation and the chromosomes coil tightly shortening and thickening.

在终变期配对的同源染色体中的姐妹染色单体完成分离，染色体变成紧密凝集的状态，缩至最小长度。

5.Diakinesis bivalents end of some of the homologous chromosomes together only at the end.

终变期末有些二价体的同源染色体只在末端连在一起。

6.During meiosis, the stage of diakinesis is crucial for the proper segregation of chromosomes.

在减数分裂过程中，diakinesis阶段对染色体的正确分离至关重要。

7.The study of diakinesis helps scientists understand genetic diversity during gamete formation.

对diakinesis的研究帮助科学家理解配子形成过程中的遗传多样性。

8.Observing diakinesis under a microscope reveals the distinct structures of chromosomes.

在显微镜下观察diakinesis可以揭示染色体的独特结构。

9.In diakinesis, homologous chromosomes are fully separated and prepare for the next phase of cell division.

diakinesis中，同源染色体完全分离，为细胞分裂的下一个阶段做准备。

10.Errors during diakinesis can lead to chromosomal abnormalities in offspring.

diakinesis期间的错误可能导致后代的染色体异常。

作文

In the vast world of biology, particularly in the study of genetics and cell division, the term diakinesis holds significant importance. It refers to the final stage of prophase I in meiosis, where homologous chromosomes condense and become visible under a microscope. This stage is crucial because it is when the genetic material is prepared for segregation into gametes. Understanding diakinesis can help us grasp the complexities of genetic variation and inheritance.During diakinesis, chromosomes are at their most condensed state, making them easier to observe. Each chromosome consists of two sister chromatids, which are identical copies of the chromosome connected at a region called the centromere. The visibility of these structures allows scientists to analyze chromosomal abnormalities and understand various genetic disorders. For instance, any irregularities during this phase can lead to conditions such as Down syndrome or Turner syndrome, which arise from improper chromosome separation.The process of diakinesis is not just a mere preparation for the next stages of meiosis; it also plays a pivotal role in genetic diversity. During meiosis, homologous chromosomes undergo a process called crossing over, where segments of DNA are exchanged between chromatids. This exchange occurs during prophase I, and diakinesis is the stage where the results of this recombination can be observed. By understanding how diakinesis facilitates genetic variation, researchers can better comprehend evolutionary processes and the adaptation of species over time.Furthermore, the study of diakinesis extends beyond basic biology. In medical research, insights gained from examining this stage of meiosis can inform fertility treatments and cancer therapies. For example, understanding how chromosomes behave during diakinesis can aid in developing techniques to ensure healthy gamete production, which is critical for successful in vitro fertilization (IVF). Additionally, as cancer often involves uncontrolled cell division, studying the mechanisms behind diakinesis could lead to breakthroughs in targeted therapies that address chromosomal instability in cancer cells.In conclusion, diakinesis is more than just a biological term; it is a gateway to understanding the intricate dance of genetics that governs life. From its role in meiosis to its implications in health and disease, the significance of diakinesis cannot be overstated. As we continue to explore the depths of cellular biology, the knowledge surrounding diakinesis will undoubtedly contribute to advancements in genetics, medicine, and our overall understanding of life itself.

在生物学的广阔世界中，特别是在遗传学和细胞分裂的研究中，术语diakinesis具有重要意义。它指的是减数分裂中前期I的最后阶段，此时同源染色体凝缩并在显微镜下可见。这个阶段至关重要，因为它是遗传物质为分离进入配子而准备的时刻。理解diakinesis可以帮助我们掌握遗传变异和遗传的复杂性。在diakinesis期间，染色体处于最浓缩的状态，使其更容易观察。每条染色体由两个姐妹染色单体组成，这些染色单体是通过称为着丝粒的区域连接的染色体的相同副本。这些结构的可见性使科学家能够分析染色体异常，并理解各种遗传疾病。例如，在此阶段的任何不规则情况都可能导致如唐氏综合症或特纳综合症等疾病，这些疾病源于染色体分离不当。diakinesis过程不仅仅是减数分裂下一阶段的准备；它还在遗传多样性中发挥着关键作用。在减数分裂中，同源染色体经历一种称为交叉的过程，其中DNA片段在染色单体之间交换。这种交换发生在前期I，而diakinesis是观察这种重组结果的阶段。通过理解diakinesis如何促进遗传变异，研究人员可以更好地理解进化过程和物种随时间的适应。此外，diakinesis的研究超越了基础生物学。在医学研究中，从检查这一减数分裂阶段获得的见解可以为生育治疗和癌症疗法提供信息。例如，理解染色体在diakinesis期间的行为可以帮助开发确保健康配子生成的技术，这对成功的体外受精（IVF）至关重要。此外，由于癌症通常涉及不受控制的细胞分裂，研究diakinesis背后的机制可能会导致针对癌细胞中染色体不稳定性的突破性治疗。总之，diakinesis不仅仅是一个生物学术语；它是理解支配生命的遗传学复杂舞蹈的门户。从它在减数分裂中的作用到它在健康和疾病中的影响，diakinesis的重要性不容小觑。随着我们继续探索细胞生物学的深度，围绕diakinesis的知识无疑将有助于遗传学、医学以及我们对生命本身的整体理解的进步。