Answer:
Transgenic animals are beneficial in the following ways (a) Studying human physiology Many transgenic animals are specifically developed to study how genes are regulated and how they affect normal functions of the body For example, the study of complex factors involved in growth such as insulin like growth factors. (b) Study of diseases Many transgenic animals are developed to increase our understanding of how genes contribute to the development of diseases such as cancer, cystic fibrosis, rheumatoid arthritis, Alzheimer's disease, etc. (c) Biological products Transgenic animals that produce useful biological products can be created by the introduction of the portion of DNA (genes), which codes for that particular product. For example, human protein (\[\alpha \] - 1 - antitrypsin) is used to treat emphysema.
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