ra,{Rte
EEE
Wu
Guo-Long
GENETICS
AND LIFE
SPAN
It
has been considered
by
medical scientists that genetic fac-
tor appears
to
be
the determinant
of human
life
span.
Available data
showed that human life span
in
many countries
is
continuously
in-
creasing.
However, people
could
not live longer than
the
maximal
level determined by their
gene.
For example
the
life span of the
offspring of close relative
marriaged parents
is
generally
shorter than usual
people.
How-
ever, human life span can be pro-
longed by improving other
factors
like
the environmental
condition.
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