nondisjunction

== English == === Etymology === From non- +‎ disjunction. === Noun === nondisjunction (plural nondisjunctions) (genetics) The failure of chromosome dyads or tetrads to separate properly during meiosis or mitosis. ==== Derived terms ==== nondisjunctional nondisjunctionally ==== Related terms ==== disjunction nondisjunct nondisjunctive ==== See also ==== nondisjunction on Wikipedia.Wikipedia