Best Answer: Crossing-over is another name for recombination or physical exchange of equal pieces of adjacent non-sister chromatids. When crossing-over occurs chromatids break and may be reattached to a different homologous chromosome. This occurs during Meiosis 1 / Prophase 1. Synapsis occurs when homologous chromosomes form tetrads and crossing-over or recombination takes place.
The best time to apply castor oil is at night, preferably couple of hours before bed time. While it is perfectly fine to use them during day time, there is a big advantage in applying them at night as this allows more time to saturate and start the process which aids in growing eyelashes.
From what I can see you would use castor oil to promote eyebrow hair regrowth at only at the risk that it will not work for your particular situation. There is no guarantee that the result will be any increase in the growth of your eyebrows and there is actually the risk that it will cause the eyebrows to thin instead.rom what I can see you would use castor oil to promote eyebrow hair regrowth at only at the risk that it will not work for your particular situation. There is no guarantee that the result will be any increase in the growth of your eyebrows and there is actually the risk that it will cause the eyebrows to thin instead.