Today, scientists are creating models of human genetic diseases using mice, flies, worms, and other animals.
When animals models are employed in the study of human disease, they are frequently selected because of their similarity to humans in terms of genetics, anatomy, and physiology.
Also, animal models are often preferable for experimental disease research because of their unlimited supply and ease of manipulation. Genetically modified mice have been used to study cancer, obesity, heart disease, diabetes, arthritis, substance abuse, anxiety, aging and parkinson’s disease. Potential cures can be tested against these mouse models. Mice are used in these experiments because their genomes are so similar to that of humans. Other common experimental organisms include fruit flies, zebra fish, and pigs.