polydactyl

简明释义

英[/ˌpɒl.iˈdæk.tɪl/]美[/ˌpɒl.iˈdæk.tɪl/]

多指（或趾）畸形的

英英释义

单词用法

同义词

反义词

例句

1.These are respectively known as postaxial, preaxial, and central polydactyl.

这些分别被称为轴后、轴前和中央多指。

2.While the Coon may be polydactyl, having one or more extra toes on their paws, this trait is generally bred out.

有的缅因猫会有先天性缺陷，往往脚趾头会多出一根或更多，商业培育者通常会排除掉这种特徵。

3.While the Coon may be polydactyl, having one or more extra toes on their paws, this trait is generally bred out.

有的缅因猫会有先天性缺陷，往往脚趾头会多出一根或更多，商业培育者通常会排除掉这种特徵。

4.Many sailors believe that polydactyl cats bring good luck on ships.

许多水手相信，船上的多指猫能带来好运。

5.In some cultures, polydactyl individuals are considered to have special abilities.

在某些文化中，多指个体被认为拥有特殊的能力。

6.The cat had a unique feature; it was a polydactyl cat with extra toes.

这只猫有一个独特的特征；它是一只多指猫，有额外的脚趾。

7.The genetic mutation that causes polydactyl traits can be passed down through generations.

导致多指特征的基因突变可以通过几代人传递。

8.The artist was fascinated by his polydactyl fingers, which allowed him to create intricate sculptures.

这位艺术家对他多指的手指感到着迷，这让他能够创作复杂的雕塑。

作文

In the world of genetics, there are many fascinating conditions that can affect living beings. One such condition is known as polydactyl, which refers to the presence of extra fingers or toes on a person or animal. This genetic trait can manifest in various ways, leading to individuals with more than the typical five digits on their hands or feet. The phenomenon of polydactyl has intrigued scientists and laypeople alike for centuries, sparking discussions about its origins, implications, and prevalence in different species.The term polydactyl comes from the Greek words 'poly,' meaning many, and 'dactylos,' meaning fingers. This condition can occur in humans, cats, dogs, and even some other animals. In humans, it is estimated that polydactyly occurs in approximately 1 in every 1,000 births, making it a relatively rare genetic anomaly. While some individuals with polydactyl may have fully functional extra digits, others might have small, non-functional appendages that require surgical removal.In cats, the polydactyl trait is particularly well-known and celebrated. Many people are familiar with the famous author Ernest Hemingway, who owned several polydactyl cats at his home in Key West, Florida. These cats, often referred to as "Hemingway cats," typically have six or more toes on each paw, giving them a unique appearance and sometimes enhanced agility. The presence of extra toes can provide these cats with better grip and balance, which may contribute to their hunting abilities. As a result, polydactyl cats have become a beloved breed among cat enthusiasts.The genetic basis for polydactyl is linked to mutations in specific genes responsible for limb development. Researchers have identified several genes that play a role in this condition, including the Sonic Hedgehog (SHH) gene, which is crucial for proper digit formation during embryonic development. Understanding the genetic mechanisms behind polydactyl not only sheds light on this particular condition but also provides insights into broader topics in developmental biology and evolutionary processes.Despite its rarity, polydactyl serves as an excellent example of how genetic diversity can manifest in the animal kingdom. It raises interesting questions about the role of genetics in evolution and adaptation. Some scientists speculate that the polydactyl trait may have offered certain advantages in specific environments, leading to its persistence in certain populations. For instance, the additional digits could improve grip and climbing ability in tree-dwelling species, suggesting that this trait might be advantageous in certain ecological niches.In conclusion, polydactyl is a captivating genetic condition that highlights the complexity and diversity of life. From its intriguing origins to its implications in various species, the study of polydactyl offers valuable insights into genetics, evolution, and the natural world. Whether it appears in humans or animals, this unique trait reminds us of the wonders of biological variation and the endless possibilities that come with it. As we continue to explore the mysteries of genetics, we may uncover even more about the fascinating world of polydactyl individuals and what they reveal about our shared biological heritage.

在遗传学的世界中，有许多迷人的条件可以影响生物体。其中一种被称为polydactyl，指的是一个人或动物身上存在额外的手指或脚趾。这种遗传特征可以以多种方式表现出来，导致个体的手或脚上有超过典型的五个数字。polydactyl现象几个世纪以来一直吸引着科学家和普通人，引发了关于其起源、影响和在不同物种中流行程度的讨论。术语polydactyl来自希腊词“poly”，意为“多”，以及“dactylos”，意为“手指”。这种情况在人类、猫、狗甚至一些其他动物中都可能发生。在人类中，估计每千个出生中就有大约1个患有多指症，使其成为一种相对罕见的遗传异常。虽然一些具有polydactyl特征的个体可能拥有功能完全的额外数字，但其他人可能只有小而无功能的附肢，需要进行外科切除。在猫中，polydactyl特征尤其著名且受到欢迎。许多人熟悉著名作家欧内斯特·海明威，他在佛罗里达州基韦斯特的家中养了几只polydactyl猫。这些猫通常在每只爪子上有六个或更多的脚趾，赋予它们独特的外观，有时还增强了敏捷性。额外的脚趾可以为这些猫提供更好的抓握和稳定性，这可能有助于它们的捕猎能力。因此，polydactyl猫已成为猫爱好者中受欢迎的品种。polydactyl的遗传基础与特定基因的突变有关，这些基因负责肢体发育。研究人员已经确定了几个与这一状况相关的基因，包括对于胚胎发育中手指形成至关重要的“声波刺猬”（SHH）基因。理解polydactyl背后的遗传机制不仅揭示了这一特定情况，还为我们提供了关于发育生物学和进化过程的更广泛的见解。尽管很少见，polydactyl作为遗传多样性如何在动物王国中表现的绝佳例子，引发了关于遗传在进化和适应中作用的有趣问题。一些科学家推测，polydactyl特征可能在特定环境中提供某些优势，从而导致其在某些群体中的持续存在。例如，额外的脚趾可以改善树栖物种的抓握和攀爬能力，这表明这一特征在某些生态位中可能是有利的。总之，polydactyl是一个引人入胜的遗传状况，突显了生命的复杂性和多样性。从其引人入胜的起源到其在各种物种中的影响，polydactyl的研究为我们提供了关于遗传学、进化和自然世界的宝贵见解。无论它出现在人类还是动物身上，这一独特特征都提醒我们生物变异的奇迹以及随之而来的无尽可能性。随着我们继续探索遗传学的奥秘，我们可能会发现更多关于polydactyl个体及其揭示的我们共同生物遗产的迷人世界。