Gynandromorphism

Gynandromorphism is a developmental condition in which one individual has both male and female characteristics. In bilateral cases, the traits are divided between the body's left and right sides.

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Sex determination: The biological processes that establish an organism's sex or sexual characteristics. Gynandromorphism results when sex-determining differences produce distinct cell populations in one body.
Bilateral gynandromorph: An individual whose male and female characteristics are divided between its left and right sides. This is the most visually distinctive spatial pattern associated with gynandromorphism.
Sexual differentiation: The developmental process through which reproductive and other sex-associated traits form. Gynandromorphism concerns differences in the resulting traits within a single individual.
Intersex: A term for variations in sex characteristics that do not fit typical definitions of female or male bodies. Intersex describes human variations in sex traits, while gynandromorphism is chiefly used for animals with mixed sex-associated traits.
Sex chromosomes: Chromosomes that participate in determining sex in many organisms. Different sex-chromosome complements among cells can contribute to mixed sexual characteristics.
Gynandromorphic cardinal: A northern cardinal with male-type plumage on one side and female-type plumage on the other. This bird illustrates bilateral plumage differences in a vertebrate.
Dosage compensation: Mechanisms that balance gene expression when organisms differ in sex-chromosome number. How cells handle sex-chromosome differences can shape the traits of distinct cell populations.
Hermaphroditism: The condition of an organism having both male and female reproductive organs or functions. It concerns reproductive biology and does not necessarily involve distinct male and female cell populations.
Mosaicism: The presence of genetically distinct cell populations within one organism derived from a single fertilized egg. Many gynandromorphs develop when cell lineages with different sex-related genotypes coexist.
Gynandromorphic butterfly: A butterfly with male and female characteristics, sometimes expressed on opposite wings. Wing patterns can make the division between sexual phenotypes especially apparent.