A Gynandromorph Grasshopper
1939
Agar, W. E.
A bilateral gynandromorph of Acridopeza reticulata is described. The sexual dimorphism in this species is very marked, the male having tegmina and wings of the usual type, while the female has no wings, and the tegmina are short and crumpled. The gynandromorph has a tegmen and wing of the male type on the right side, and on the left a female tegmen and no wing. Other minor differences between the normal male and female are reproduced on the two sides. Internally, there is a testis and male accessory organs on the right side, and an ovary with its associated organs on the left. This correspondence between the gonads and the somatic sexual characters of the two sides of the body contrasts with the situation in Drosophila, where the two gonads are always of the same sex in gynandromorphs. On the usually accepted theory of the origin of this type of gynandromorph by loss of an X‐chromosome from a daughter cell during cleavage, this difference between the gynandromorphs of Drosophila and Acridopeza is in accordance with the different modes of origin of the germ‐cells in the Diptera and Orthoptera.
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