分类目录归档：dna
Transcriber: Andrea McDonough Reviewer: Bedirhan Cinar
Every human being starts out the same way:
two cells, one from each parent,
found each other and became one.
And that one cell reproduced itself,
let me tell you a story it's my first
year as a new high school science
teacher and I'm so eager I'm so excited
I'm pouring myself into my lesson plans
but I'm slowly coming to this horrifying
realiza
so I thought it'd be a podium so I'm a
bit scared Chris asked me to tell again
how we found the structure of DNA and
since you know I follow his orders I'll
do it but it slightly bores me and yeah
I w
The DNA in just one of your cells
gets damaged tens of thousands of times per day.
Multiply that by your body's hundred trillion or so cells,
and you've got a quintillion DNA errors everyday.
And be
Here's a conundrum:
identical twins originate from the same DNA,
so how can they turn out so different
even in traits that have a significant genetic component?
For instance, why might one twin get h
The discovery of the structure of DNA
was one of the most important scientific achievements in the last century,
in human history, in fact.
The now-famous double helix is almost synonymous with Watson
Let's say there's a disaster that sends humanity back to the Stone Age.
Can our knowledge and history survive?
The printed page will decompose.
Hard drive storage will deteriorate.
Even stones will ev
From the smallest single-celled organism
to the largest creatures on earth,
every living thing is defined by its genes.
The DNA contained in our genes acts like an instruction manual for our cells.
F
Two sisters take the same DNA test.
The results show that one sister is 10% French, the other 0%.
Both sisters share the same two parents,
and therefore the same set of ancestors.
So how can one be
Transcriber: Thanh Van Dang Reviewer: Emma Gon
Looking at statistics, it is safe to assume
that 40% of you have picked up a sunburn at some point during last year.
That is maybe not the case
if you