asynapsis

简明释义

英[ˌeɪsɪnˈæpsɪs]美[ˌeɪsɪˈnæpsɪs]

n. [遗] 不联会（减数分裂时同源染色体的不配对现象）

复 数 a s y n a p s e s

英英释义

单词用法

同义词

反义词

例句

1.The team genetically engineered male mice such that they lacked TEX11 function and found that this caused chromosomal asynapsis during the process of gamete formation.

研究小组通过遗传工程改造小鼠使其缺乏TEX11功能，结果发现TEX11功能的缺失导致在配子形成过程中染色体不联会。

2.The team genetically engineered male mice such that they lacked TEX11 function and found that this caused chromosomal asynapsis during the process of gamete formation.

研究小组通过遗传工程改造小鼠使其缺乏TEX11功能，结果发现TEX11功能的缺失导致在配子形成过程中染色体不联会。

3.During meiosis, the occurrence of asynapsis 不配对 can lead to genetic variation.

在减数分裂过程中，asynapsis 不配对的发生可能导致遗传变异。

4.The phenomenon of asynapsis 不配对 can result in chromosomal abnormalities.

现象 asynapsis 不配对 可能导致染色体异常。

5.Researchers are studying the effects of asynapsis 不配对 on fertility in certain species.

研究人员正在研究在某些物种中，asynapsis 不配对对生育力的影响。

6.The study of asynapsis 不配对 is crucial for understanding genetic diversity.

研究 asynapsis 不配对 对理解遗传多样性至关重要。

7.In some plants, asynapsis 不配对 occurs during gamete formation.

在一些植物中，asynapsis 不配对 在配子形成过程中发生。

作文

In the realm of genetics and cellular biology, the term asynapsis refers to a phenomenon during meiosis where homologous chromosomes fail to pair properly. This irregularity can lead to significant consequences for the organism, particularly in terms of genetic diversity and reproductive success. Understanding asynapsis is crucial for biologists and geneticists as it sheds light on the complexities of genetic inheritance and the mechanisms that drive evolution.During the process of meiosis, which is essential for sexual reproduction, chromosomes undergo a series of intricate steps to ensure that genetic material is accurately divided between gametes. Normally, homologous chromosomes—those that are similar in shape, size, and genetic content—pair up during a stage called prophase I. This pairing is vital because it allows for genetic recombination, where segments of DNA are exchanged between the paired chromosomes, creating new combinations of genes. However, in instances of asynapsis, this pairing does not occur as it should. As a result, the chromosomes remain unpaired, leading to complications during the subsequent stages of meiosis.The implications of asynapsis can be profound. When homologous chromosomes do not align correctly, it can result in aneuploidy, a condition characterized by an abnormal number of chromosomes in a cell. This can lead to various developmental disorders and diseases, such as Down syndrome, which is caused by an extra copy of chromosome 21. Furthermore, asynapsis can affect an organism's ability to produce viable gametes, ultimately impacting fertility and the potential for species survival.Research into asynapsis has revealed that several factors can contribute to this phenomenon. Environmental stressors, genetic mutations, and even errors during DNA replication can disrupt the normal pairing process. For example, certain chemicals or radiation exposure can cause damage to the DNA, preventing proper chromosome alignment. Additionally, specific genetic mutations may alter the proteins responsible for facilitating chromosome pairing, leading to increased instances of asynapsis.Understanding the causes and consequences of asynapsis is essential not only for basic biological research but also for applied sciences such as agriculture and medicine. In agriculture, for instance, researchers can manipulate the meiotic process to enhance crop yields and develop new strains of plants with desirable traits. By studying how asynapsis affects genetic variation, scientists can create more resilient crops that can withstand environmental challenges.In medicine, insights gained from studying asynapsis can inform our understanding of genetic disorders and potential therapeutic interventions. By identifying the genetic and environmental factors that lead to asynapsis, researchers can develop strategies to mitigate its effects, potentially improving reproductive health and outcomes for individuals affected by chromosomal abnormalities.In conclusion, asynapsis is a critical concept within the fields of genetics and cellular biology. Its implications extend beyond the microscopic level, influencing broader aspects of evolution, fertility, and species survival. Continued research into asynapsis will undoubtedly yield valuable insights that can enhance our understanding of life itself and improve human health and agricultural practices.

在遗传学和细胞生物学领域，术语asynapsis指的是减数分裂过程中同源染色体未能正确配对的现象。这种不规则性可能对生物体产生重大影响，特别是在遗传多样性和生殖成功方面。理解asynapsis对于生物学家和遗传学家至关重要，因为它揭示了遗传继承的复杂性以及驱动进化的机制。在减数分裂过程中，这一过程对有性生殖至关重要，染色体经历一系列复杂的步骤，以确保遗传物质在配子之间的准确分配。通常，同源染色体——那些在形状、大小和遗传内容上相似的染色体——在称为前期I的阶段配对。这种配对至关重要，因为它允许发生遗传重组，即配对染色体之间交换DNA片段，从而创造出新的基因组合。然而，在asynapsis的情况下，这种配对并未如预期那样发生。结果，染色体保持未配对状态，导致后续减数分裂阶段出现并发症。asynapsis的影响可能是深远的。当同源染色体未能正确对齐时，可能导致非整倍体，这是一种细胞中染色体数量异常的情况。这可能导致各种发育障碍和疾病，例如唐氏综合症，这是由第21号染色体的额外拷贝引起的。此外，asynapsis可能会影响生物体产生可行配子的能力，最终影响生育力和物种生存的潜力。对asynapsis的研究揭示了几种可能导致这种现象的因素。环境压力、基因突变甚至DNA复制过程中的错误都可能干扰正常的配对过程。例如，某些化学物质或辐射暴露可能会损害DNA，阻止染色体的正确排列。此外，特定的基因突变可能会改变负责促进染色体配对的蛋白质，导致asynapsis的发生率增加。了解asynapsis的原因和后果对于基础生物研究以及农业和医学等应用科学至关重要。例如，在农业中，研究人员可以操纵减数分裂过程，以增强作物产量并开发具有理想特征的新植物品种。通过研究asynapsis如何影响遗传变异，科学家可以创造出能够抵御环境挑战的更具韧性的作物。在医学领域，研究asynapsis所获得的见解可以帮助我们理解遗传疾病和潜在的治疗干预措施。通过识别导致asynapsis的遗传和环境因素，研究人员可以制定策略以减轻其影响，潜在地改善受染色体异常影响的个体的生殖健康和结果。总之，asynapsis是遗传学和细胞生物学领域中的一个关键概念。它的影响超越了微观层面，影响着进化、生育和物种生存的更广泛方面。对asynapsis的持续研究无疑将产生宝贵的见解，增强我们对生命本身的理解，并改善人类健康和农业实践。