Tip:
Highlight text to annotate it
X
A fly appears from somewhere.
Flying over the head and the plant
The living things in the room
They look different
but have one thing in common.
The same DNA structure
The human, the fly, and the plant all have the same DNA molecule
and consists of the same nucleotides.
Adenine, cytosine, thymine, guanine are the four bases
that form the "double helix," the shape of a twisted ladder.
The length of a human body's DNA is as long as 100 billion km.
A length that can coil around the Earth 2.5 million times.
However
97% of them are junk DNA known to have no significance.
The rest of the 3% have DNA codes that make up the genes.
A person has 35,000 genes.
Human and fruit flies are 70% identical in genes.
It is the order of the genes that makes them look different.
Fish, amphibians, reptiles, birds
All have common genes.
"However complicated it seems, a salamander, a philosopher, a bird, and a gingko tree are
all common in genes, which is a path that all kinds of life pass through."
-Jennifer Ackerman, Scientific writer
Life began 3.5 billion years ago.
In 3.5 billion years, duplicates of DNA have evolved.
Genes moving on trees
Genes moving in the water
Babies of various animals trying to leave genes for the next generation
"They created our body and mind. The fact that they are alive
is the ultimate theoretical evidence of our existence.
These are the genes.
We are merely machines surviving to deliver the molecule
called DNA to the next generation." -Richard Dawkins, Scientist