ALAT ALAT Species-Specific Care and Experimental Models Questions and Answers 3

Question 1

Which of the following best describes a transgenic mouse?

Accepted Answer

A mouse whose genome has been altered to contain foreign DNA or modified genes

Answer

A mouse that has been selectively bred for coat color

Answer

A mouse cloned from another individual

Answer

A mouse raised in a germ-free environment

Question 2

What is the primary purpose of ear notching or ear tagging in laboratory rodents?

Accepted Answer

To provide permanent individual identification for research tracking

Answer

To improve air circulation in densely housed colonies

Answer

To mark animals that have received experimental compounds

Answer

To reduce fighting by marking dominant animals

Question 3

Which condition is commonly seen in aged female rats and is characterized by mammary tissue growths?

Accepted Answer

Mammary fibroadenoma

Answer

Ringtail

Answer

Sialodacryoadenitis

Answer

Malocclusion

Question 4

In a Xenopus laevis (African clawed frog) colony, what is the recommended approach to prevent chytridiomycosis spread?

Accepted Answer

Quarantine new animals and practice strict biosecurity to prevent Batrachochytrium dendrobatidis introduction

Answer

Treat all frogs with antifungal agents prophylactically

Answer

House frogs at elevated temperatures above 30°C permanently

Answer

Disinfect frogs with bleach solution weekly

Question 5

What is 'ringtail' in laboratory rats and what environmental condition causes it?

Accepted Answer

Annular constrictions of the tail caused by low humidity

Answer

A genetic coat color mutation caused by selective breeding

Answer

Tail tumors caused by UV light exposure

Answer

Bacterial skin infection spread through water

Question 6

Which of the following rodent species is known for its extreme sensitivity to dietary fat and is commonly used in obesity and metabolic syndrome research?

Accepted Answer

C57BL/6 mouse

Answer

Sprague-Dawley rat

Answer

Syrian hamster

Answer

Mongolian gerbil