Chiasma. The cross-shaped exchange configuration between non sister chromatids of homologous chromosomes that is visible during prophase I of meiosis. chiasma The site where the exchange of chromosome segments between homologous chromosomes takes place (crossing-over) (pl.: chiasmata). PICTURE
Vegan diets are based on grains and other seeds, legumes (particularly beans), fruits, vegetables, edible mushrooms, and nuts. Meat analogues (mock meats) based on soybeans (tofu), or wheat-based seitan/gluten, are a common source of plant protein, usually in the form of vegetarian sausage, mince, and veggie burgers.
In various sources, plant-based diet has been used to refer to: 1  Veganism: diet of vegetables, legumes, fruit, grains, nuts, and seeds, but no food from animal sources. 2  Vegetarianism: diet of vegetables, legumes, fruit, nuts, etc., that may include eggs and dairy, but no meat.