Domestication of animals

Sheep with an ear tag that is part of a national livestock identification system

Hereford cattle, domesticated for beef production.

Reduction in skull size with neoteny - grey wolf and chihuahua skulls.

Dogs and sheep were among the first animals to be domesticated.

The domestication of animals is the scientific theory of the mutual relationship between animals with the humans who have influence on their care and reproduction. Charles Darwin recognized the small number of traits that made domestic species different from their wild ancestors. He was also the first to recognize the difference between conscious selective breeding in which humans directly select for desirable traits, and unconscious selection where traits evolve as a by-product of natural selection or from selection on other traits. There is a genetic difference between domestic and wild populations. There is also such a difference between the domestication traits that researchers believe to have been essential at the early stages of domestication, and the improvement traits that have appeared since the split between wild and domestic populations. Domestication traits are generally fixed within all domesticates, and were selected during the initial episode of domestication of that animal or plant, whereas improvement traits are present only in a proportion of domesticates, though they may be fixed in individual breeds or regional populations.

单词	Domestication of animals
释义	Domestication of animals 英语例句库 The first was the domestication of animals. 第一个阶段是驯养动物。原声例句流利说 The domestication of animals allowed people to raise and use animals for food and work. 动物的驯化使人们能够饲养和使用动物作为食物和工作。起源的故事 But with the rise of the domestication of animals and agriculture, humans began to settle down in fixed locations for long periods of time. 但随着动物被驯化和农业的兴起，人类开始在固定的地方长时间定居。物种起源 This, in fact, is the great bar to the domestication of animals. 事实上，这是动物驯化的一大障碍。社会学 Crash Course Pastoral societies are based around the domestication of animals and are also nomadic, moving from place to place to keep their herds fed. 游牧社会以驯养动物为基础，也是游牧社会，从一个地方移动到另一个地方以养活他们的牛群。 VOA Standard 2013年9月合集 Gagneaux says for many years it was assumed that TB took the same path – from animals to humans. However, the research shows that TB in humans pre-dates the domestication of animals. Gagneaux 说，多年来人们一直认为结核病走的是同一条路——从动物到人类。然而，研究表明人类的结核病早于动物的驯化。英语百科 Domestication of animals The domestication of animals is the scientific theory of the mutual relationship between animals with the humans who have influence on their care and reproduction. Charles Darwin recognized the small number of traits that made domestic species different from their wild ancestors. He was also the first to recognize the difference between conscious selective breeding in which humans directly select for desirable traits, and unconscious selection where traits evolve as a by-product of natural selection or from selection on other traits. There is a genetic difference between domestic and wild populations. There is also such a difference between the domestication traits that researchers believe to have been essential at the early stages of domestication, and the improvement traits that have appeared since the split between wild and domestic populations. Domestication traits are generally fixed within all domesticates, and were selected during the initial episode of domestication of that animal or plant, whereas improvement traits are present only in a proportion of domesticates, though they may be fixed in individual breeds or regional populations.
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