Ring-shaped bodies are found in the nucleus of Lacandonia schismatica, a rare plant with the sexual organs inverted. They are 0.5-mum-diameter structures that present an electron-dense external ring surrounding a central ...

The synaptonemal complex (SC) is the central key structure for meiosis in organisms undergoing sexual reproduction. During meiotic prophase I, homologous chromosomes exchange genetic information at the time they are attached ...