permissive conditions

permissive conditions

  1. (genetics) conditions under which an ORGANISM or CELL does not express a conditional mutation (see CONDITIONAL MUTANT and so does not display the MUTANT PHENOTYPE. For a CONDITIONAL LETHAL mutation, permissive conditions are not lethal to the mutant.
  2. (virology) conditions in which VIRUS INFECTION and MULTIPLICATION occur normally in a cell. Compare NONPERMISSIVE CONDITIONS.
References in periodicals archive ?
A significant amount of control logic circuits is associated not only with operating control devices, but with valid protection circuits and obtaining permissive conditions before continuing.
But they've got to be able to do so in the permissive conditions," State Department spokeswoman Victoria Nuland told reporters on Friday, saying the United States had "extreme concerns" about the continued violence.
praised how Russian government authorities enabled the permissive conditions