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Introduction to Cloning
UPDATE: Dolly the sheep was
killed on 16th February as she had a lung disease. Read
story here. What's next?
To be able to cure illnesses or make plants healthier,
a scientist needs to clone a Gene, which involves making
many copies of the gene. This is done in a laboratory,
and the method is called cloning or recombinant DNA
small sheep in the photo is Dolly, the most famous sheep
in the world. She is cloned from another adult sheep.
Every genetic makeup in her cell is the same as a ewe
of a different generation. Read more about Dolly the Sheep.
Cloning is done by putting a foreign piece of DNA with
a special information into a usually circular DNA that
acts as a carrier. This circular DNA is called a vector,
which is a means of transport. The vector allows replication
and transfer of the foreign DNA from one living organism
This living organism is called a host, because
its body acts as a temporary home for this DNA and its
vector. The new circular DNA with the foreign piece
is called a "clone" or a "recombinant
vector" which is different from the parental vector
(the original DNA before the new piece was inserted
Scientists use many different types of vectors
in different ways for cloning.