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.
Put down the cheeseburger! A vegan diet may help you live a longer, healthier life. Experts have long suspected that switching to a vegan or vegetarian diet may ease rheumatoid arthritis (RA) symptoms. A vegan diet eliminates all animal products, including meat, fish, eggs and dairy; most ordinary vegetarian diets eliminate only meat.