pronucleus

简明释义

英[ˌprəʊˈnjuːklɪəs]美[proˈnʊkliəs;proˈnjʊkliəs]

n. [生物] 原核；[遗] 前核

复 数 p r o n u c l e i 或 p r o n u c l e u s e s

英英释义

单词用法

同义词

反义词

例句

1.Objective To investigate the relationship between the first polar body morphology of oocyte and the zygote morphology in pronucleus stage, embryo quality in cleavage stage.

目的探讨卵细胞第一极体形态与原核期受精卵形态、卵裂期胚胎质量的关系。

2.The ooplasm of gynogenetic crucian carp may also lack some high molecules responsible for membrane assembly of male pronucleus.

银鲫卵质中还可能缺乏某些与雄性原核的核膜重组装有关的大分子物质。

3.Objective To investigate the relationship between the first polar body morphology of oocyte and the zygote morphology in pronucleus stage, embryo quality in cleavage stage.

目的探讨卵细胞第一极体形态与原核期受精卵形态、卵裂期胚胎质量的关系。

4.During fertilization, the sperm enters the egg and its nucleus, forming a male pronucleus 前核.

在受精过程中，精子进入卵子及其细胞核，形成一个雄性pronucleus 前核。

5.The fusion of the female pronucleus 前核 with the male pronucleus 前核 is crucial for zygote formation.

雌性pronucleus 前核与雄性pronucleus 前核的融合对于合子形成至关重要。

6.The timing of pronucleus 前核 formation is critical for proper cell division in early embryos.

在早期胚胎中，pronucleus 前核形成的时机对细胞分裂至关重要。

7.Scientists observed the development of the pronucleus 前核 in various species during their research on embryology.

科学家在研究胚胎学时观察到不同物种中pronucleus 前核的发展。

8.In assisted reproductive technologies, monitoring the pronucleus 前核 stage can indicate successful fertilization.

在辅助生殖技术中，监测pronucleus 前核阶段可以指示受精是否成功。

作文

In the realm of biology, particularly in the study of fertilization and early embryonic development, the term pronucleus is quite significant. The pronucleus refers to the haploid nucleus of a sperm or an egg cell that forms after the gametes fuse during fertilization. This process is crucial as it marks the beginning of the development of a new organism. Understanding the role of the pronucleus can shed light on various aspects of genetics and embryology.When a sperm cell penetrates an egg cell, both the sperm and the egg contribute their genetic material. Each of these gametes contains a single set of chromosomes; thus, when they merge, they form two distinct pronuclei. One pronucleus comes from the sperm, and the other from the egg. These two pronuclei will eventually combine to create a diploid nucleus, which contains a complete set of chromosomes necessary for the development of the embryo.The significance of the pronucleus extends beyond mere genetic contribution. It plays a vital role in ensuring that the genetic material from both parents is appropriately represented in the offspring. This balance is essential for proper development and functioning of the resulting organism. Any errors in this process can lead to developmental issues or genetic disorders.Moreover, the study of the pronucleus has implications in reproductive technologies such as in vitro fertilization (IVF). In IVF, understanding how the pronucleus forms and functions can help scientists and doctors improve fertilization techniques and increase the chances of successful pregnancies. For instance, monitoring the formation of the pronucleus can provide insights into the health and viability of the embryos before implantation.Additionally, the pronucleus is a focal point in research regarding cloning and genetic engineering. Scientists manipulate the pronucleus to introduce new genetic material into an organism, which can lead to advancements in medicine and agriculture. By studying how the pronucleus operates, researchers can develop techniques to edit genes more effectively, potentially curing genetic diseases or enhancing desirable traits in crops.The concept of the pronucleus also invites philosophical discussions about life and identity. At what point does a new organism begin? Is it at the formation of the pronucleus, when the genetic materials combine, or later in development? These questions are not only scientific but also ethical and moral, as they touch upon the nature of life itself.In conclusion, the pronucleus is a fundamental component in the processes of fertilization and embryonic development. Its role in combining genetic material from both parents is crucial for the creation of new life. As research continues to evolve, the understanding of the pronucleus will undoubtedly lead to new discoveries in genetics, reproductive health, and biotechnology. By exploring the intricacies of the pronucleus, we gain valuable insight into the very beginnings of life and the potential for future advancements in science and medicine.

在生物学的领域，特别是在研究受精和早期胚胎发育时，术语pronucleus是相当重要的。pronucleus指的是在受精过程中，配子融合后形成的精子或卵细胞的单倍体细胞核。这个过程至关重要，因为它标志着新生物发展开始的时刻。理解pronucleus的作用可以揭示遗传学和胚胎学的各个方面。当一个精子细胞穿透一个卵细胞时，精子和卵子都贡献了它们的遗传物质。这两个配子各自包含一组染色体；因此，当它们合并时，会形成两个不同的pronuclei。一个pronucleus来自精子，另一个来自卵子。这两个pronuclei最终会结合形成一个二倍体细胞核，包含了新生物发育所需的一整套染色体。pronucleus的重要性不仅仅在于遗传贡献。它在确保父母双方的遗传物质在后代中得到适当表现方面发挥着至关重要的作用。这种平衡对于后代的正常发育和功能至关重要。这个过程中的任何错误都可能导致发育问题或遗传疾病。此外，pronucleus的研究在体外受精（IVF）等生殖技术中也具有重要意义。在IVF中，理解pronucleus如何形成和运作可以帮助科学家和医生改善受精技术，提高成功怀孕的机会。例如，监测pronucleus的形成可以提供有关胚胎健康和生存能力的见解，从而在植入前筛选出更优质的胚胎。此外，pronucleus还是克隆和基因工程研究的重点。科学家操纵pronucleus以将新的遗传物质引入生物体，这可能导致医学和农业的进步。通过研究pronucleus的运作方式，研究人员可以开发更有效的基因编辑技术，潜在地治愈遗传疾病或增强农作物的优良特性。pronucleus的概念还引发了关于生命和身份的哲学讨论。一个新的生物体何时开始存在？是在pronucleus形成时，还是在发育的后期？这些问题不仅是科学性的，也是伦理和道德上的，因为它们触及生命本质的问题。总之，pronucleus是受精和胚胎发育过程中一个基本组成部分。它在结合来自父母的遗传物质方面的作用对新生命的创造至关重要。随着研究的不断发展，对pronucleus的理解无疑会导致遗传学、生殖健康和生物技术的新发现。通过探索pronucleus的复杂性，我们获得了对生命起源的宝贵洞察，以及未来科学和医学进步的潜力。