Consum'science

The GM salmon, a new breed?
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The salmon genetically modified by the Canadian company Aquabounty allows
one ethical but also scientific questioning. It is in this article where you can
find all the scientific answers in questions you are asking yourselves. Here we
will raise the subject of the transgenesis, we will name the genes implicated in
those salmons and we will see the consequences of such modifications.
How can we modify a gene?
We can make it by transgenesis
and it is directly made in a cell egg of
a body. We modify the sequence of
nuclenotides of a DNA fragment
which codes for a gene. By
modifying it, we create a new allelle
of this gene: a new version. Then
another protocol begins within the
cell so that the gene expresses
himself: the transcription and the
translation to create a protein.
The DNA is in the pit of cells but so
that these genes express themselves
it is necessary to produce a protein.
For that purpose, an enzyme:
polymerase ARN separates both
stalks to make ARN pre-messenger.
It contains only a single stalk and
uses too an alphabet in 4 letters: in,
C, G and U (T included in the stalks
of DNA is replaced by U), its sugar is
the ribose and this chain of
nucleotide is made by
complementarity for the stalk of
transcribed or not coding DNA. It is
the transcription! ARN being
finer, it crosses easily in the pores of
pits to join the cytoplasm.
Consum’science 9.