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.
People have used castor oil to prevent and reduce fine lines, winkles, spots, blemishes, and other skin problems for ages. It works as a humectant, helping your skin retain moisture. 1  Apply a thick layer of castor oil on your skin. 2  Wrap the area with plastic wrap or saran wrap.pply coconut oil. Using coconut oil is perhaps the best natural way to keep your skin moisturized. 1  Rub coconut oil generously on your skin. 2  Massage the area to aid absorption into the skin.