biological sex sex An organismal quality inhering in a bearer by virtue of the bearer's ability to undergo sexual reproduction in order to differentiate the individuals or types involved. EFO_URI: http://www.ebi.ac.uk/efo/EFO_0000695 James Malone Jie Zheng MO_680 NCIt:C28421 PATO:0000047 Term applied to any organism able to undergo sexual reproduction in order to differentiate the individuals or types involved. Sexual reproduction is defined as the ability to exchange genetic material with the potential of recombinant progeny. The assemblage of physical properties or qualities by which male is distinguished from female; the physical difference between male and female; the distinguishing peculiarity of male or female. Tomasz Adamusiak biological sex biological sex http://mged.sourceforge.net/ontologies/MGEDOntology.owl#sex organismal quality