Both, and more. In essence, those parts that are not strictly
dependent on the physical unit (sequence) of a gene itself. Things
like DNA methylation & chromosome packing that affect a gene's
expression might also be considered "extra-genetic". These are
things that are often able to change quicker than the sequence
of a gene.
>BH> "Genes are important because they are the controllers and
>BH> executers of developmental processes." -- Raff
TI>Yes, taken at face value, Raff's statement is ridiculous.
TI>Genes can't execute anything.
KO> By this you mean they need a metabolic system to first transcibe
KO> the gene, then translate it into a protein or enzyme that then
KO> exerts the control or executes the appropriate function, no?
Yes. Context is very important for what a gene can do.
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