Queried GO term:

  idGO:0007548   Detailed information
  namesex differentiation
  namespacebiological_process
  def"The establishment of the sex of an organism by physical differentiation." [GOC:ai]
  is_aGO:0003006 ! developmental process involved in reproduction

Monarch genes assigned with this GO terms:

DPOGS2093221.3e-29
DPOGS2041822.9e-24
DPOGS2009341.4e-21