crossing over

简明释义

横越

英英释义

例句

1.When the two roads meet at the intersection, they are considered to be crossing over each other.

当两条道路在交叉口相遇时，它们被认为是交叉。

2.The concept of crossing over can also apply to emotional boundaries in relationships.

在关系中，交叉的概念也可以适用于情感界限。

3.The scientist observed that the genes were crossing over during cell division.

科学家观察到基因在细胞分裂过程中发生了交叉。

4.In a relay race, the baton must be passed without crossing over into another runner's lane.

在接力赛中，接力棒必须在不交叉到其他跑道的情况下传递。

5.The artist's work often explores themes of crossing over between different cultures.

这位艺术家的作品常常探讨不同文化之间的交叉主题。

作文

In the world of genetics, the term crossing over refers to a crucial process that occurs during meiosis, where homologous chromosomes exchange genetic material. This exchange leads to genetic variation, which is fundamental for evolution and the adaptation of species. The phenomenon of crossing over not only plays a significant role in the diversity of life but also has implications in understanding hereditary diseases and traits. When two homologous chromosomes align during prophase I of meiosis, they can form structures known as chiasmata. It is at these points that segments of DNA are swapped between the chromosomes. This process ensures that each gamete produced carries a unique combination of genes, which is essential for sexual reproduction. Without crossing over, offspring would inherit identical sets of chromosomes from their parents, limiting genetic diversity.The significance of crossing over extends beyond just genetics. It serves as a metaphor in various aspects of life, particularly in personal growth and transformation. For instance, when individuals go through significant life changes, they often experience a form of crossing over—a transition from one phase of life to another. This could be moving from adolescence to adulthood, changing careers, or overcoming personal challenges. Each of these transitions involves leaving behind old habits and embracing new ones, much like how chromosomes exchange genetic information to create something novel.In literature and storytelling, crossing over can symbolize the journey of characters who must navigate different worlds or realities. A classic example can be found in fantasy novels where protagonists often cross into magical realms, facing trials that transform them. These narratives reflect the essence of crossing over as a transformative experience, highlighting the importance of change and adaptation in both fictional and real-life scenarios.Furthermore, crossing over can also relate to cultural exchanges in our increasingly globalized world. As people migrate and interact, they share ideas, traditions, and values, leading to a rich tapestry of cultural fusion. This blending of cultures can be seen as a form of crossing over, where individuals and communities learn from one another and evolve together. Such interactions can foster understanding and acceptance, breaking down barriers that divide us.In conclusion, the concept of crossing over encompasses a wide range of meanings, from its biological roots in genetics to its metaphorical applications in personal and cultural contexts. Whether it is the exchange of genetic material that drives evolution or the transformative journeys we undertake in our lives, crossing over signifies change, adaptation, and the endless possibilities that arise from embracing new experiences. Understanding this multifaceted term can enrich our appreciation of the complexities of life, encouraging us to see the beauty in both genetic diversity and personal growth.

在遗传学中，术语交叉互换指的是一个重要的过程，该过程发生在减数分裂期间，同源染色体交换遗传物质。这种交换导致了遗传变异，这是进化和物种适应的基础。交叉互换现象不仅在生命的多样性中发挥重要作用，还对理解遗传疾病和特征具有重要意义。当两个同源染色体在减数分裂的前期I阶段对齐时，它们可以形成称为交叉点的结构。正是在这些点上，DNA的片段在染色体之间被交换。这个过程确保每个产生的配子携带独特的基因组合，这对有性繁殖至关重要。如果没有交叉互换，后代将从父母那里继承相同的染色体组，从而限制遗传多样性。交叉互换的重要性不仅仅局限于遗传学。它在生活的各个方面，尤其是在个人成长和转变中，作为一种隐喻。举例来说，当个人经历重大生活变化时，他们常常经历一种形式的交叉互换——从生活的一个阶段过渡到另一个阶段。这可能是从青春期过渡到成年，换工作，或克服个人挑战。每一个这些过渡都涉及放弃旧习惯，拥抱新习惯，就像染色体交换遗传信息以创造出新事物一样。在文学和故事讲述中，交叉互换可以象征角色必须穿越不同世界或现实的旅程。一个经典的例子可以在幻想小说中找到，主角常常跨越魔法领域，面对改变他们的试炼。这些叙述反映了交叉互换作为一种转变经历的本质，突显了变化和适应在虚构和现实场景中的重要性。此外，交叉互换还可以与我们日益全球化的世界中的文化交流相关。当人们迁移和互动时，他们分享思想、传统和价值观，导致文化融合的丰富织锦。这种文化的交融可以被视为一种交叉互换，个人和社区相互学习，共同演变。这种互动可以促进理解和接受，打破分隔我们的障碍。总之，交叉互换的概念涵盖了广泛的含义，从其在遗传学中的生物学根源到在个人和文化背景中的隐喻应用。无论是推动进化的遗传物质交换，还是我们在生活中进行的转型旅程，交叉互换都象征着变化、适应，以及从拥抱新体验中产生的无尽可能性。理解这个多层次的术语可以丰富我们对生活复杂性的欣赏，鼓励我们看到遗传多样性和个人成长中的美丽。