During it, the process of synapsis is completed, homologous chromosomes join into tetrads, and crossing-over takes place.
In Arabidopsis, a crucial function of the first part of this period seems to be controlled by SOLO DANCERS. In the Xenophus model species, Chk1 kinase arrests oocyte development at this point. Secondary replication occurs during its second sub-phase and it terminates with attachment of non-kinetochore microtubules. Divided into leptotene, zygotene, pachytene, and diplotene sub-phases, this phase ends with diakinesis. During it, the process of synapsis is completed, homologous chromosomes join into tetrads, and crossing-over takes place. FTP, name the phase followed by metaphase I; the first stage of meiosis.
In Arabidopsis, a crucial function of the first part of this period seems to be controlled by SOLO DANCERS.
prophase I (prompt on prophase; prompt on meiosis until "second")