mutagenesis

简明释义

英[ˌmjuːtəˈdʒenɪsɪs]美[ˌmjʊtəˈdʒenəsɪs]

n. 突变形成；变异发生

英英释义

单词用法

同义词

反义词

例句

1.Objective: To develop a simple and efficient way to perform site-directed mutagenesis.

目的：介绍一种简便、有效的定点突变技术。

2.Objective To study the role and mechanism of nucleoprotein in DNA oxidation and mutagenesis induced by nickel.

目的探讨核蛋白在镍对DNA氧化和致突变中的作用机制。

3.The results indicated that protoplast formation and mutagenesis are the potential methods for strain selection and improvement in edible fungi.

研究结果表明，香菇原生质体分离诱变是一种很有应用价值的食用菌菌种选育方法。

4.‘Error catastrophe’ ‘or extinction mutagenesis’ is a theory about mutations and survival of populations.

“错误突变”，“或阻止突变”是一个关于种群的突变和生存的理论。

5.'Error catastrophe' 'or extinction mutagenesis' is a theory about mutations and survival of populations.

“错误突变”，“或阻止突变”是一个关于种群的突变和生存的理论。

6.One idea that was proposed about five years ago is "lethal mutagenesis."

“致命性诱变”是大约五年前提出的一个想法。

7.Cell cycle analysis can provide reference for researching the physical and chemical mutagenesis to citrus calli.

细胞周期分析可为研究柑橘愈伤组织理化诱变提供依据。

8.The study of mutagenesis reveals how certain chemicals can lead to genetic changes.

对突变发生的研究揭示了某些化学物质如何导致基因变化。

9.Researchers are investigating the role of mutagenesis in cancer development.

研究人员正在调查突变发生在癌症发展中的作用。

10.Understanding mutagenesis is crucial for developing new treatments for genetic diseases.

理解突变发生对开发新的遗传疾病治疗方法至关重要。

11.Radiation exposure can cause mutagenesis in living organisms.

辐射暴露可以导致生物体内的突变发生。

12.The experiment aimed to quantify the rates of mutagenesis in bacterial cultures.

该实验旨在量化细菌培养中突变发生的速率。

作文

Mutagenesis is a fundamental biological process that refers to the induction of changes in the genetic material of an organism. This process can occur naturally or be induced by external factors, such as chemicals, radiation, or even biological agents. Understanding mutagenesis (突变发生) is crucial for various fields, including genetics, molecular biology, and medicine. It plays a significant role in evolution, as it introduces genetic diversity within populations, allowing species to adapt to changing environments. In nature, mutagenesis (突变发生) can happen spontaneously during DNA replication. Errors may occur when DNA polymerase synthesizes new strands, leading to mutations that can be passed down to future generations if they occur in germ cells. These spontaneous mutations contribute to the genetic variation that is essential for natural selection. However, not all mutations are beneficial; some can be neutral or harmful, potentially leading to diseases such as cancer. Induced mutagenesis (突变发生) involves the deliberate application of mutagens—agents that cause mutations. Chemical mutagens, such as certain alkylating agents, can modify DNA bases, resulting in mispairing during replication. Similarly, physical mutagens like ionizing radiation can cause breaks in the DNA strands, leading to chromosomal aberrations. These induced mutations are often utilized in laboratory settings for research purposes, such as creating mutant strains of bacteria or plants that exhibit desirable traits, like increased resistance to pests or environmental stressors. One of the most notable applications of mutagenesis (突变发生) is in the field of agriculture. Scientists use induced mutagenesis (突变发生) to develop crop varieties with improved yield, nutritional value, and disease resistance. For instance, through controlled exposure to radiation or chemicals, researchers can create new plant varieties that are better suited to withstand climate change and food security challenges. This technique has led to the development of numerous staple crops that have significantly contributed to global food production. In addition to agriculture, mutagenesis (突变发生) is also pivotal in medical research. By studying mutations, scientists can gain insights into the mechanisms of various diseases, particularly cancer. Certain mutations can activate oncogenes or deactivate tumor suppressor genes, leading to uncontrolled cell growth. Understanding these processes allows researchers to develop targeted therapies that can specifically address the underlying genetic causes of cancer. Despite its benefits, mutagenesis (突变发生) raises ethical concerns, particularly in the context of genetic engineering and biotechnology. The potential risks associated with releasing genetically modified organisms into the environment must be carefully considered. Regulatory frameworks are necessary to ensure that the benefits of mutagenesis (突变发生) in research and agriculture do not come at the expense of ecological balance or human health. In conclusion, mutagenesis (突变发生) is a complex and multifaceted process that has profound implications across various scientific disciplines. From enhancing agricultural productivity to advancing medical research, the understanding and application of mutagenesis (突变发生) continue to shape our world. As we move forward, it is essential to balance innovation with ethical considerations to harness the potential of mutagenesis (突变发生) responsibly.