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.
Pure castor oil, which is extracted from castor beans, is an odorless and tasteless oil that is used for a variety of skin ailments. In recent years, castor oil has been used in conjunction with other natural oils, such as rosemary oil and peppermint oil, to make a safe and effective natural insect repellent. Castor oil. Other natural oils, such as rosemary, lemon eucalyptus, cedar, cinnamon and geranium oils. Rubbing alcohol.