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.
A lot of people want to know about castor oil as whether it helps hair growth. Well, the truth behind castor oil and hair growth is that it can surely help a lot in taking care of hair loss and hair thinning problem. In fact many people have been using castor oil for years to treat their hair loss problem and have got positive results too. Use of castor oil is a natural way to make your hair healthier and thicker. Having plenty of medicinal uses, castor oil is very effective in maintaining beautiful and healthy hair. So, if you are facing hair problems such as hair thinning and hair loss, it is time to get a castor oil and get benefitted from it.