About Goniaea australasiae (Leach, 1814)
Goniaea australasiae is a species of grasshopper that belongs to the family Acrididae. A number of experiments have been conducted using G. australasiae to study three key topics related to meiosis and genetic recombination: the timing of genetic recombination relative to the sequence of meiosis stages, the connection between chiasmata and crossing over, and the overall mechanism of recombination. When researchers combined cytological and autoradiographic analyses of meiosis in this species, they found that crossing over occurs through the breakage and exchange of segments between nonsister, homologous chromatids. Each individual exchange event produces a chiasma that can be observed through cytological study. The researchers also identified that this type of genetic recombination occurs during the "early pachytene" meiotic stage, which occurs well after premeiotic chromosome duplication is completed.
