  It is shown that distributed chaos, generated by Hamiltonian DNA dynamics
with spontaneously broken time translational symmetry, imprints itself on the
DNA sequence of Arabidopsis thaliana (a model plant for genetic sequencing and
mapping) and of the NRXN1 and BRCA2 human genes (as an example). The
base-stacking interactions in the DNA duplex and degenerate codon groups have
been discussed in this context.
