The term used to describe an animal whose genes have been altered using biotechnology is genetically modified organism (GMO), or specifically, a genetically modified animal (GMA).

Other terms you might see include:

* Transgenic animal: This specifically refers to an animal that has had foreign DNA inserted into its genome.

* Genetically engineered animal: This is a broader term that encompasses any animal whose genetic makeup has been intentionally altered.

It's important to note that not all GMOs are created through the same methods. While some GMOs are created through the insertion of foreign genes, others might involve modifying existing genes or deleting specific genes.