Light micrograph of a fetal ovary showing several oocytes (immature egg cells) undergoing meiosis (gamete formation). The oocytes are in the pachytene
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 paired homologous chromosomes form a tetrad known as a bivalent. This is the stage when homologous recombination (crossing over) occurs. The paired chromosomes appear as thick.
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Photo credit: © JOSE CALVO / SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: -, anatomy, biological, biology, bivalent, cell, chromosomes, eosin, female, fetal, fetus, foetal, foetus, formation, gamete, gametogenesis, haematoxylin, histological, histology, light, meiosis, meiotic, micrograph, microscopic, microscopy, nucleus, oocyte, oogonia, ovarian, ovary, ovogenesis, pachytene, prophase, recombination, reproductive, system
