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.
Good sources of protein can be hard to find if you're a vegan. But, adding protein to a meatless diet isn't as hard as you think, even if you don't eat dairy or other animal products. Vegetable sources of protein are plentiful and easy to add to a vegan diet if you have some basic knowledge of nutrition. Here are some good sources of protein that even vegans can eat. 1. Nuts and Seeds. Nuts and seeds are very good sources of protein for vegans. Nuts provide plenty of protein, as well as other nutrients like vitamins A and E, phosphorus, potassium, fiber and essential fatty acids.