Meiotic Prophase I

**Definition:** The prophase of the first division of MEIOSIS (in which homologous CHROMOSOME SEGREGATION occurs). It is divided into five stages: leptonema, zygonema, PACHYNEMA, diplonema, and diakinesis.

**Tree numbers:** - G04.144.220.220.687.444 - G05.113.220.687.500

**Synonyms:** - Meiotic Prophase 1 - Prophase 1 - Prophase I