balanced polymorphism

简明释义

平衡多态现象

英英释义

例句

1.Research on balanced polymorphism has revealed how environmental factors can maintain multiple alleles within a population.

关于平衡多态性的研究揭示了环境因素如何在种群中维持多个等位基因。

2.In the study of evolutionary biology, balanced polymorphism can explain why certain traits persist in a population despite selective pressures.

在进化生物学研究中，平衡多态性可以解释为什么某些特征在种群中尽管受到选择压力仍然持续存在。

3.The concept of balanced polymorphism is crucial for understanding how genetic diversity contributes to the survival of species.

了解遗传多样性如何促进物种生存的过程中，平衡多态性的概念至关重要。

4.The coexistence of different color morphs in a butterfly species illustrates balanced polymorphism, allowing them to evade predators more effectively.

一种蝴蝶物种中不同颜色形态的共存展示了平衡多态性，使它们能够更有效地躲避捕食者。

5.In some populations, the presence of sickle cell trait is an example of balanced polymorphism, which provides resistance to malaria while also maintaining normal hemoglobin levels.

在某些种群中，镰状细胞特征的存在是平衡多态性的一个例子，它提供了对疟疾的抵抗，同时保持正常的血红蛋白水平。

作文

Balanced polymorphism is a fascinating concept in evolutionary biology that describes the maintenance of multiple phenotypes within a population. This phenomenon occurs when different traits confer advantages to individuals in varying environmental conditions, allowing for a stable coexistence of these traits. One classic example of balanced polymorphism (平衡多态性) is observed in the case of sickle cell anemia. In regions where malaria is prevalent, individuals who are heterozygous for the sickle cell gene (carrying one normal hemoglobin allele and one sickle cell allele) have a selective advantage. They are less likely to suffer from severe malaria, while those with two normal alleles are more susceptible to the disease. Conversely, individuals with two sickle cell alleles face serious health issues, but they are resistant to malaria. This creates a scenario where the heterozygotes thrive, thus maintaining the balanced polymorphism (平衡多态性) in the population.Another notable example can be seen in the case of the peppered moth in England. Before the industrial revolution, the lighter-colored moths were more common because they blended in with the light-colored lichens on trees, avoiding predation from birds. However, as pollution darkened the trees, darker moths became more prevalent due to their better camouflage. The existence of both color forms—light and dark—demonstrates balanced polymorphism (平衡多态性), as each phenotype has its advantages depending on the environmental context.The concept of balanced polymorphism (平衡多态性) extends beyond just physical traits; it can also apply to behavioral characteristics. For instance, in certain species of fish, some individuals may adopt a sneaky mating strategy, while others may display more dominant behaviors. Both strategies can be successful under different circumstances, leading to a balance of both types within the population. This diversity not only enhances the resilience of the population but also contributes to the overall adaptability of the species in changing environments.In conclusion, balanced polymorphism (平衡多态性) serves as a vital mechanism in evolution, promoting genetic diversity and enabling populations to adapt to fluctuating environmental pressures. By understanding how different traits can coexist and provide advantages under various conditions, we gain valuable insights into the complexities of natural selection and the dynamics of ecosystems. This knowledge underscores the importance of preserving biodiversity, as it is through such variations that species can survive and thrive amidst the challenges posed by their environments. As we continue to study and appreciate the intricacies of balanced polymorphism (平衡多态性), we are reminded of the delicate balance of nature and the significance of each unique trait within a population.

平衡多态性是进化生物学中的一个迷人概念，描述了在一个种群中维持多种表型的现象。当不同的性状在不同的环境条件下赋予个体优势时，就会出现这种现象，从而允许这些性状的稳定共存。平衡多态性的一个经典例子是在镰状细胞贫血的案例中。在疟疾流行的地区，携带镰状细胞基因的杂合子（携带一个正常的血红蛋白等位基因和一个镰状细胞等位基因）具有选择优势。他们不太可能遭受严重的疟疾，而那些有两个正常等位基因的人则更容易受到这种疾病的影响。相反，拥有两个镰状细胞等位基因的个体面临严重的健康问题，但他们对疟疾有抵抗力。这就创造了一个杂合子繁荣的场景，从而维持了种群中的平衡多态性。另一个显著的例子可以在英国的胡椒蛾中看到。在工业革命之前，浅色蛾子更为常见，因为它们与树上的浅色地衣融为一体，避免了鸟类的捕食。然而，随着污染使树木变黑，深色蛾子由于更好的伪装而变得更加普遍。这两种颜色形式——浅色和深色的存在，展示了平衡多态性，因为每种表型在不同的环境背景下都有其优势。平衡多态性的概念不仅仅适用于物理特征；它也可以应用于行为特征。例如，在某些鱼类中，一些个体可能采取狡猾的交配策略，而其他个体则表现出更具主导性的行为。在不同情况下，这两种策略都可能成功，从而在种群中保持两者的平衡。这种多样性不仅增强了种群的韧性，还促进了物种在变化环境中的整体适应能力。总之，平衡多态性作为进化中的一个重要机制，促进了遗传多样性，使种群能够适应不断变化的环境压力。通过理解不同性状如何共存并在各种条件下提供优势，我们获得了对自然选择复杂性和生态系统动态的宝贵见解。这一知识强调了保护生物多样性的重要性，因为正是通过这种变异，物种才能在其环境所带来的挑战中生存和繁荣。随着我们继续研究和欣赏平衡多态性的复杂性，我们被提醒自然的微妙平衡以及种群中每一种独特特征的重要性。