epigenesis

简明释义

英[ˌepɪˈdʒenɪsɪs]美[ˌepəˈdʒenəsɪs]

n. 后成；[胚] 渐成说；外力变质

英英释义

单词用法

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例句

1.The content, distribution and mode of occurrence of chromium in coals are influenced by many factors, such as coal-forming environment, coal-forming plants, and the epigenesis.

煤中铬的含量和赋存状态受成煤环境、成煤植物和后生地质作用等因素的影响。

2.The content, distribution and mode of occurrence of chromium in coals are influenced by many factors, such as coal-forming environment, coal-forming plants, and the epigenesis.

煤中铬的含量和赋存状态受成煤环境、成煤植物和后生地质作用等因素的影响。

3.A more intriguing possibility, though, is that the relevant genes are affected by epigenesis, a process in which chemicals attached to the DNA control its activity.

然而，一个更有意思的可能性是后生作用影响了这些基因。后生作用是指与DNA相接的化学物质来控制其活动。

4.That means environmentally induced effects that are translated into action by this sort of epigenesis might be being confused by researchers with inherited ones.

这意味着研究人员正受着把环境引起的通过这种表观修饰转变为行为的效应和由于遗传引起的行为的效应搞混的困扰。

5.The most advanced among them, however, are now beginning to find another factor, which they have called epigenesis, the creative impulse.

然而，在他们中最高级的现在正在寻找另外的因素，他们称这种因素为渐成说，是创造的推动力。

6.Also can spend the pagoda tree stoving, grind fine pink, mix into ferments into flour pink edible of epigenesis steamed bread.

也可将槐花烘干，研成细粉，掺入白面粉中发酵后成馒头食用。

7.Petrossian, T. Clarke, S. Methylation of DNA, protein, and even RNA species are integral processes in epigenesis.

蛋白质，甚至RNA种类的甲基化是表观形成中完整的过程。

8.In lower forms of life, where changes are rapid, epigenesis can be demonstrated under a microscope.

在较低等的生命形式中，它们的变化很快，这种渐成可以在显微镜下面显示出来。

9.The concept of epigenesis refers to the development of an organism from a simple form to a more complex one.

表观发生的概念指的是一个生物体从简单形态发展到更复杂形态的过程。

10.Researchers are studying epigenesis to understand how environmental factors influence genetic expression.

研究人员正在研究表观发生以了解环境因素如何影响基因表达。

11.The theory of epigenesis contrasts with preformation, which suggests that organisms develop from miniature versions of themselves.

表观发生理论与预成论相对立，后者认为生物体是从其微型版本发展而来的。

12.In developmental biology, epigenesis is crucial for understanding how cells differentiate into various types.

在发育生物学中，表观发生对于理解细胞如何分化成不同类型至关重要。

13.The study of epigenesis can provide insights into developmental disorders and potential therapies.

对表观发生的研究可以为发育障碍和潜在治疗提供见解。

作文

In the realm of biology, the concept of epigenesis (表观发生) plays a crucial role in understanding how organisms develop from a single fertilized egg into complex multicellular beings. The term epigenesis refers to the process by which an organism develops through a series of stages, where each stage is influenced by various genetic and environmental factors. This idea contrasts with the preformation theory, which suggested that organisms develop from miniature versions of themselves. Instead, epigenesis emphasizes that development is a dynamic process shaped by interactions between genes and their surroundings. The significance of epigenesis can be observed in many biological phenomena. For instance, during embryonic development, cells differentiate into various types, such as muscle, nerve, or skin cells. This differentiation is guided by epigenetic mechanisms, which involve changes in gene expression without altering the underlying DNA sequence. Factors such as DNA methylation and histone modification play vital roles in this regulation, determining which genes are turned on or off at specific times and locations within the developing organism. Moreover, epigenesis highlights the importance of environmental influences on development. External factors such as nutrition, stress, and exposure to toxins can lead to epigenetic changes that may affect an individual's health and development. For example, research has shown that maternal nutrition during pregnancy can have lasting effects on the offspring's epigenetic profile, potentially influencing their susceptibility to diseases later in life. This connection between environment and genetics underscores the complexity of biological development and the need for a holistic approach to understanding health. In addition to its implications for individual development, epigenesis also has broader evolutionary significance. Epigenetic changes can be heritable, meaning they can be passed down to subsequent generations. This challenges the traditional view of evolution, which primarily focused on genetic mutations as the main drivers of change. Instead, epigenesis suggests that organisms can adapt to their environments in real-time through reversible epigenetic modifications, providing a mechanism for rapid evolutionary responses. Furthermore, the study of epigenesis has important implications for medicine. Understanding how epigenetic changes influence disease processes can lead to new therapeutic strategies. For instance, certain cancers have been linked to abnormal epigenetic modifications that silence tumor suppressor genes. By targeting these epigenetic alterations, researchers aim to develop treatments that restore normal gene function and inhibit tumor growth. In conclusion, epigenesis (表观发生) is a fundamental concept in biology that encompasses the intricate processes of development, the interplay between genetics and environment, and the potential for adaptation and evolution. As research continues to uncover the complexities of epigenesis, it becomes increasingly clear that this field holds the key to understanding not only how organisms develop but also how they respond to their environments and evolve over time. The insights gained from studying epigenesis could revolutionize our approach to health and disease, highlighting the importance of considering both genetic and epigenetic factors in the pursuit of better medical outcomes.

在生物学领域，epigenesis（表观发生）这一概念在理解有机体如何从一个受精卵发展为复杂的多细胞生物方面发挥着至关重要的作用。epigenesis一词指的是一个有机体通过一系列阶段发展的过程，每个阶段都受到各种遗传和环境因素的影响。这个观点与预成论相对立，后者认为有机体是从微型版本中发展而来的。相反，epigenesis强调，发育是一个动态过程，由基因与其环境之间的相互作用所塑造。 epigenesis的重要性可以在许多生物现象中观察到。例如，在胚胎发育过程中，细胞分化为不同类型，如肌肉、神经或皮肤细胞。这种分化受到表观遗传机制的指导，这些机制涉及在不改变DNA序列的情况下改变基因表达。DNA甲基化和组蛋白修饰等因素在这种调控中发挥着至关重要的作用，决定了在特定时间和位置上哪些基因被开启或关闭。 此外，epigenesis突显了环境对发育的重要影响。营养、压力和毒素暴露等外部因素可能导致表观遗传变化，从而影响个体的健康和发展。例如，研究表明，妊娠期间母亲的营养状况会对后代的表观遗传特征产生持久影响，可能影响他们后来罹患疾病的易感性。这种环境与遗传之间的联系突显了生物发育的复杂性，以及理解健康所需的整体方法。 除了对个体发育的影响，epigenesis在进化上的意义也更为广泛。表观遗传变化可以是可遗传的，这意味着它们可以传递给后代。这挑战了传统的进化观念，后者主要关注遗传突变作为变化的主要驱动因素。相反，epigenesis表明，有机体可以通过可逆的表观遗传修饰实时适应其环境，为快速的进化响应提供了一种机制。 此外，对epigenesis的研究对医学具有重要意义。了解表观遗传变化如何影响疾病过程可以导致新的治疗策略。例如，某些癌症已与异常的表观遗传修饰相关联，这些修饰使肿瘤抑制基因沉默。通过针对这些表观遗传改变，研究人员旨在开发恢复正常基因功能并抑制肿瘤生长的治疗方法。 总之，epigenesis（表观发生）是生物学中的一个基本概念，涵盖了发育的复杂过程、遗传与环境之间的相互作用以及适应和进化的潜力。随着研究不断揭示epigenesis的复杂性，越来越清楚这一领域掌握了理解有机体如何发展、如何应对其环境和随时间演化的关键。从研究epigenesis中获得的见解可能会彻底改变我们对健康和疾病的看法，突显在追求更好医疗结果时考虑遗传和表观遗传因素的重要性。