Explain prophase 1

Prophase 1 is essentially the crossing over and recombination of genetic material between non sister chromatids - this results in the genetically unidentical, haploid daughter chromatid cells. Prophase I is divided into five phases: leptotene, zygotene, pachytene, diplotene, and diakinesis. 

Chromosomes become visible, crossing-over occurs, the nucleolus disappears, the meiotic spindle forms, and the nuclear envelope disappears. At the start of prophase I, the chromosomes have already duplicated. During prophase I, they coil and become shorter and thicker and visible under the light microscope.

Prophase is the first stage of mitosis. In prophase, chromosomes condense and become visible. spindle fibers emerge from the centrosomes.
In prometaphase,

• chromosomes continue to condense.
• kinetochores appear at the centromeres.
• mitotic spindle microtubules attach to kinetochores.
• centrosomes move toward opposite poles.