ALAT practice exam unit 5 Questions with Correct Answers

ALAT practice exam unit 5 Q uestions with Correct Answers Which of the following statements regarding outbred mice is FALSE? A. Outbred mice have been bred for maximum heterozygosity B. Outbred mice have a stable overall genetic makeup C. Outbred mice all share the same genes as every other mouse in the population D. Outbred mice are created by mating a closed population (animals of at least 4 generations) of unrelated animals C. Outbred mice all share the same genes as every other mouse in the population T/F: Mice less than 10 days of age may be caught by cupping the hands around the whole body or by picking up a group of pups together with a small amount of nesting material True T/F: Both respiration and heart rate in the mouse are easily measured by observing or feeling the chest False T/F: An acceptable management technique that may reduce or prevent fighting among male mice housed together is to house young males together from weaning True T/F: The F1 on the end of a hybrid designation indicates that this is the second generation False T/F: Inbred strains usually have larger litters than outbred stocks False T/F: By 7 days of age, mouse pups are fully furred and their eyes are open False What are hybrid mice? The offspring of two different strains of mice Male neonate mice can be distinguished from females by their: Larger anogenital distance List 5 signs of pain, distress, or illness in mice: Ruffled coat, hunched, not moving, weight loss, dehydration, staining near the eyes Weight of an adult male mouse in grams: 20-40 grams Average lifespan of a mouse: 12-36 months Gestation length of a mouse: 19-21 days List 3 forms of environmental enrichment commonly given to mice: group housed, wooden blocks, and treats Skin tenting and sunken eyes are signs of what health problem? DehydrationWhat is the scientific name of the common house mouse? Mus Musculus Newborne mice are born _________ meaning that they are born hairless with eyes and ear canals closed Altricial List 3 examples of permanent methods of identifying mice: Tattoos, chips, and ear/toe clippings What is the term for coming into heat 24 hours after giving birth? Post partum estrus What is the approximate normal body weight for male and female rats? Males 300- 500 grams and Females 250-300 grams What anatomical feature distinguishes rats from mice? The lack of a gallbladder Which rat is albino, has a wide head, long ears, and a tail that is half its body length? A. Sprague- Dawley B. Wistar C. Long- Evans D. Fischer B. Wistar T/F: Male rats cannot be pair housed or they will fight False T/F: Molar teeth of rats grow constantly False T/F: Rats are nocturnal and are never active during the day False T/F: Red staining around the eyes and nose is due to porphyrin, a secretion that can be normal True T/F: Toe clipping is the recommended identification method for adult rats False Rats can be tickled by caretakers, reducing stress during handling and restraint True What are two common types of inbred strains of rats? Fischer 344 and Lewis Which rat stock is also known as the hooded rat? Long evans What problem can occur if you pick rats up by the tip of the tail? Degloving Which of the following statements regarding outbred mice is FALSE? A. Outbred mice have been bred for maximum heterozygosity B. Outbred mice have a stable overall genetic makeup C. Outbred mice all share the same genes as every other mouse in the population D. Outbred mice are created by mating a closed population (animals of at least 4 generations) of unrelated animals C. Outbred mice all share the same genes as every other mouse in the population T/F: Mice less than 10 days of age may be caught by cupping the hands around the whole body or by picking up a group of pups together with a small amount of nesting material True T/F: Both respiration and heart rate in the mouse are easily measured by observing or feeling the chest False T/F: An acceptable management technique that may reduce or prevent fighting among male mice housed together is to house young males together from weaning True T/F: The F1 on the end of a hybrid designation indicates that this is the second generation False T/F: Inbred strains usually have larger litters than outbred stocks False T/F: By 7 days of age, mouse pups are fully furred and their eyes are open False What are hybrid mice? The offspring of two different strains of mice Male neonate mice can be distinguished from females by their: Larger anogenital distance List 5 signs of pain, distress, or illness in mice: Ruffled coat, hunched, not moving, weight loss, dehydration, staining near the eyes Weight of an adult male mouse in grams: 20-40 grams Average lifespan of a mouse: 12-36 months Gestation length of a mouse: 19-21 days List 3 forms of environmental enrichment commonly given to mice: group housed, wooden blocks, and treats Skin tenting and sunken eyes are signs of what health problem? DehydrationWhat is the scientific name of the common house mouse? Mus Musculus Newborne mice are born _________ meaning that they are born hairless with eyes and ear canals closed Altricial List 3 examples of permanent methods of identifying mice: Tattoos, chips, and ear/toe clippings What is the term for coming into heat 24 hours after giving birth? Post partum estrus What is the approximate normal body weight for male and female rats? Males 300- 500 grams and Females 250-300 grams What anatomical feature distinguishes rats from mice? The lack of a gallbladder Which rat is albino, has a wide head, long ears, and a tail that is half its body length? A. Sprague- Dawley B. Wistar C. Long- Evans D. Fischer B. Wistar T/F: Male rats cannot be pair housed or they will fight False T/F: Molar teeth of rats grow constantly False T/F: Rats are nocturnal and are never active during the day False T/F: Red staining around the eyes and nose is due to porphyrin, a secretion that can be normal True T/F: Toe clipping is the recommended identification method for adult rats False Rats can be tickled by caretakers, reducing stress during handling and restraint True What are two common types of inbred strains of rats? Fischer 344 and Lewis Which rat stock is also known as the hooded rat? Long evans What problem can occur if you pick rats up by the tip of the tail? Degloving