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.
Growing Castor oil plant from seed. Sow in early spring in pots or modules in ordinary potting compost. Cover with perlite and keep at 21C. The seed coat can easily become damaged and such seeds will not germinate The seed germinates quickly in warmth, light is not needed for germination.