Auxotroph: a mutantplugin-autotooltip__default plugin-autotooltip_bigMutant: an individual that has a different phenotype than wildtype and likely contains one more mutations that cause this difference. that cannot synthesize one more essential nutrient from minimal mediaplugin-autotooltip__default plugin-autotooltip_bigMinimal media: growth media that only contains (other than some kind of carbon source as food) inorganic nutrients, usually some nitrogen and phosphorous containing salts. needed for survival or proliferation.