environnement (2) Nature and nurture (2) Euthenics (2) Ecology (2) Adaptation (Biology) (2) peau (1) polymère (1) bruit (1) modèle (1) viande (1) information (1) expérience scientifique (1) effet (1) ligne (1) Selection (1) Weight gain (1) Rooms (1) Weights and measures (1) Skin (1) Sex (1) Science (1) Reproduction (1) Percentage (1) Pens (1) Noise (1) Meat (1) Males (1) Growth (1) Generations (1) Females (1)