linkage

noun

1.
an associative relation
Derived from:
link
2.
(genetics) traits that tend to be inherited together as a consequence of an association between their genes; all of the genes of a given chromosome are linked (where one goes they all go)
3.
a mechanical system of rods or springs or pivots that transmits power or motion
Derived from:
link
4.
the act of linking things together
Derived from:
link