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.
To keep your diet vegan, check food labels to avoid these lesser-known animal-based ingredients: 1  Albumen: Made from eggs, milk, and animal blood. 2  Bone char: Derived from animal bone ash. 3  Carmine or cochineal: Red pigment made from crushed beetles.  Casein: A cowâs milk 1  protein. Methionine: Essential amino acids made from eggs or cowâs milk.