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.
How to apply castor oil. Itâs best to use castor oil as a hair mask. This is particularly helpful if youâre trying to regrow hair or give it more moist and shine. Castor oil has a thick consistency, so you can mix it with coconut oil, olive oil or jojoba oil in a half and half ratio.