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.
A cancer prevention diet is one that is high in fiber, low in fat (especially animal fat), and includes generous portions of fruits and vegetables. It also minimizes or excludes alcohol. The best diets are pure vegetarian diets.
Fruits and vegetables are staples of the vegan diet. As many omnivores or meat eaters would guess, fruits and vegetables are staples of the vegan diet. Vegans eat them in salads, casseroles, stir fry dishes and with dips such as hummus and baba ghannouj. All vegetables and fruits are considered vegan in their natural, raw states.