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B1 中级 英语 5:29 Educational

How CRISPR lets you edit DNA - Andrea M. Henle

TED-Ed · 1,884,815 次观看 · 添加于 3 周前

学习统计

B1

CEFR 等级

5/10

难度

字幕 (94 片段)

00:06

From the smallest single-celled organism

00:09

to the largest creatures on earth,

00:11

every living thing is defined by its genes.

00:14

The DNA contained in our genes acts like an instruction manual for our cells.

00:20

Four building blocks called bases are strung together in precise sequences,

00:24

which tell the cell how to behave

00:26

and form the basis for our every trait.

00:30

But with recent advancements in gene editing tools,

00:33

scientists can change an organism’s fundamental features in record time.

00:37

They can engineer drought-resistant crops

00:40

and create apples that don’t brown.

00:43

They might even prevent the spread of infectious outbreaks

00:46

and develop cures for genetic diseases.

00:49

CRISPR is the fastest, easiest, and cheapest of the gene editing tools

00:53

responsible for this new wave of science.

00:56

But where did this medical marvel come from?

00:59

How does it work?

01:00

And what can it do?

01:02

Surprisingly, CRISPR is actually a natural process

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