Selective breeding · 选择育种
| English | 中文 | Pinyin · 拼音 |
|---|---|---|
| selective breeding/sɪˈlektɪv ˈbriːdɪŋ/ | 选择育种 | xuǎn zé yù zhǒng |
| artificial selection/ˌɑːtɪˈfɪʃl sɪˈlekʃn/ | 人工选择 | rén gōng xuǎn zé |
| gene pool/dʒiːn puːl/ | 基因库 | jī yīn kù |
Choosing the parents
- For thousands of years, humans have bred animals and plants to get features they want.
- This is selective breeding 选择育种 (artificial selection 人工选择).
选择亲本
- 几千年来,人类繁育动物和植物以得到他们想要的特征。
- 这是选择育种(selective breeding,人工选择)。
Selective breeding means choosing: · 选择育种意味着选择:
Humans pick the parents with the wanted trait. · 人类挑选有想要性状的亲本。
Selective breeding is also known as ______ selection. · 选择育种也被称为______选择。
Humans, not the environment, do the selecting. · 人类,而不是环境,做选择。
How it works
- Choose parents with the desired feature (e.g. high milk yield, big fruit).
- Breed them together, then choose the best offspring to breed again.
- Repeat over many generations.
In selective breeding, humans choose which organisms breed, over many generations
它如何工作
- 选择有期望特征的亲本(例如高产奶量、大果实)。
- 把它们繁育在一起,然后选择最好的后代再次繁育。
- 经过许多代重复。
在选择育种中,人类经过许多代选择哪些生物繁育
Selective breeding · 选择育种
Humans choose which organisms breed, to develop a useful feature over many generations. · 人类选择哪些生物繁育,以经过许多代发展出一个有用的特征。
Which are uses of selective breeding? (Select all that apply.) · 哪些是选择育种的用途?(选择所有适用项。)
The first three are selective breeding; the last is not. · 前三个是选择育种;最后一个不是。
Examples
- Crops: bred for higher yield, disease resistance, better taste.
- Animals: cows for more milk, dogs for specific traits.
例子
- 作物:为更高产量、抗病性、更好的味道繁育。
- 动物:奶牛为更多牛奶,狗为特定性状。
The main difference from natural selection is that selective breeding is driven by: · 与自然选择的主要区别是选择育种由以下哪种驱动:
Humans choose the parents, not the environment. · 人类选择亲本,而不是环境。
Selective breeding can reduce variation in a population. · 选择育种能减少一个种群中的变异。
Breeding from a narrow set shrinks the gene pool. · 从一小组繁育缩小基因库。
Like natural selection, but human-chosen
- In natural selection, the environment decides who reproduces.
- In selective breeding, humans decide — choosing the parents each generation.
Selective breeding reduces variation. Repeatedly breeding from a narrow set of "best" individuals shrinks the gene pool 基因库. This can leave a population vulnerable to disease — the downside of artificial selection.
像自然选择,但由人类选择
- 在自然选择中,环境决定谁繁殖。
- 在选择育种中,人类决定——每一代选择亲本。
选择育种减少变异。 反复从一小组"最好的"个体繁育缩小基因库。这能使一个种群易受疾病影响——人工选择的缺点。
You've got it
- selective breeding: choose parents with the desired feature, breed, repeat over generations
- used to improve crops (yield, resistance) and animals (milk, traits)
- it's like natural selection but humans choose; it reduces variation
你掌握了
- 选择育种:选择有期望特征的亲本,繁育,经过几代重复
- 用于改良作物(产量、抗性)和动物(牛奶、性状)
- 它像自然选择但由人类选择;它减少变异