Chiasma (genetics) In genetics, a chiasma (pl. chiasmata) is the point of contact, the physical link, between two (non-sister) chromatids belonging to homologous chromosomes. At a given chiasma, an exchange of genetic material can occur between both chromatids, what is called a chromosomal crossover, but this is much more frequent during meiosis than mitosis. In meiosis, absence of a chiasma usually result in improper chromosomal segregation and aneuploidy.
For example, certain kinds of breast cancers are insulin sensitive, and thus eating a lot of carbohydrates (ironically like in a vegan diet) would cause your body to produce lots of insulin, making this an inefficacious strategy in reducing risk for those particular kinds of cancer.
A vegan diet does not permit any foods derived from animal sources, such as meat, dairy products and eggs. Some vegans also avoid honey and gelatin, as well as products produced using animal byproducts, such as commercially produced wines and refined sugar. Vegans represent between 0.3 and 1 percent of the U.S. population, according to the Vegetarian Resource Group. A vegan diet eliminates the saturated fats and chemicals found in animal products; however, vegans may need to take certain vitamins to avoid deficiencies.