Read the following text and answer the following question on the basi...
Mice were the first transgenic animal and they had a high successful rate of transformation among the mammals.
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Read the following text and answer the following question on the basi...
Transgenic Animals and their Characteristics
Transgenic animals are organisms that have their DNA manipulated to possess and express an extra gene. This manipulation allows the animals to carry genes from other species, resulting in changes to their genome. One of the most well-known transgenic animals is Tracy, the first transgenic sheep.
Purpose of Producing Transgenic Animals
There are two primary purposes for producing transgenic animals: specific economic traits and disease modeling.
Specific Economic Traits
Transgenic animals can be developed with specific economic traits that are desirable for various industries. For example, scientists can manipulate the genes of animals to enhance their meat quality, increase milk production, or improve resistance to diseases. These modifications can have significant economic benefits for the agricultural and livestock industries.
Disease Models
Transgenic animals are also produced as disease models. By genetically manipulating animals to exhibit disease symptoms, researchers can study the effectiveness of potential treatments or develop new therapies. These models provide valuable insights into the mechanisms of diseases and help in the development of targeted therapies.
Identifying the Most Common Transgenic Animal
The question asks us to identify the most common transgenic animal out of the given options: mice, cat, dog, and sheep. To determine the answer, we need to consider the prevalence of transgenic animals in scientific research.
Mice as Transgenic Animals
Mice have been extensively used as transgenic animals in scientific research. They have several advantages, including a short lifespan, rapid reproduction, and genetic similarity to humans. These characteristics make mice ideal for studying genetic diseases and testing potential treatments. Additionally, the ease of genetic manipulation and the availability of well-established techniques for creating transgenic mice contribute to their widespread use in research.
Conclusion
Based on the prevalence of transgenic animals in scientific research, the most common transgenic animals are mice. Their genetic similarity to humans, ease of manipulation, and established techniques make mice the preferred choice for creating transgenic models. While transgenic sheep like Tracy are notable, they are not as commonly used as mice in research. Therefore, option 'A' (Mice) is the correct answer.
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