Light micrograph of a fetal ovary showing several oocytes (immature egg cells) undergoing meiosis (gamete formation). The oocytes are in the pachytene stage of prophase I. In this stage the homologous chromosomes form a tetrad known as a bivalent, where homologous recombination (crossing over) occurs. The paired chromosomes appear as thick strands.
November 24th, 2019
Viewed 2 Times - Last Visitor from Ann Arbor, MI on 01/16/2020 at 4:42 AM