Whilst this process occurs the chromosome begin to uncoil, contrary to the natural progression of Prophase, however, they are still coiled enough to allow a distinct image of a chiasma formation under a microscope. read more
The prophase of the first meiotic division is complicated and of long duration. The first meiotic division of first prophase stage contains five sub-stages namely, Leptotene, Zygotene, Pachytene, Diplotene and Diakinesis. The following happens in the Prophase-I of Leptotene. read more
Leptotene is the first of five stages of Prophase 1 and consists of the condensing of the already replicated chromosomes, this procedure continues throughout Prophase 1. The chromosomes become visible by using electron microscopy, which can distinguish between sister chromatids. read more
Leptotene. In this first substage of prophase I, the chromosomes have appeared within the nuclear envelope (shown in the diagram at right as a tan circle with a brown border), but are not yet fully condensed. read more