Mosaic Gyandormorphy in a Morpho butterfly — part female, part male, insect gynandromorphs arise from genetic mutations. Mosaic gyandomorphy describes a case in which the two sexes aren’t defined. The cause of this phenomenon is typically, but not always, an event in mitosis during early development. While the organism is only a few cells large, one of the dividing cells does not split its sex chromosomes typically. This leads to one of the two cells having sex chromosomes that cause male development and the other cell having chromosomes that cause female development.
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