Why might scientist be interested inn making transgenic organisms

Because they provide new insights in the research for biotechnology and other useful resources to the knowledge of biology.

Transgenic means that one or more DNA sequences from another species has been introduced by artificial means. For example, animals usually are made transgenic by having a small sequence of DNA injected into a fertilized egg or developing embryo. Transgenic plants can be made by introducing foreign DNA into a variety of different tissues.