Uurimustööks vajalik teada
expression is dynamically and intimately intertwined with environmental cues. Genes in the
nucleus do indeed represent blueprints for proteins, the molecules responsible for physical
traits and the mechanics underlying behavior. However, it is now recognized that the
regulation of gene expression, that is the switching on and off of genes, is not a property of
the genes themselves, but is controlled by environmental signals (Nijhout, 1990). We are also
now aware of the fact that organisms under stress are able to actively alter their DNA and
create new genes in an effort to accommodate environmental challenges (Thaler, 1994).
Rather than being genetically predetermined, organisms develop in balance with their
environment and purposively select, or if necessary rewrite, what they perceive to be
appropriate gene programs to ensure their survival.
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