Top five branches of biotechnology are: 1. Animal Biotechnology – It deals with the development of transgenic animals for increased milk or meat production with resistance to various diseases.

2. Medical Biotechnology – Deals about the large scale production of hormones, blood serum proteins; in the development of antibiotics, and other medically useful products.

3. Industrial Biotechnology – It deals with commercial production of various useful organic substances.

4. Environmental Biotechnology – It deals with detoxification of waste and industrial effluents, treatment of sewage water, and control of plant diseases and insects through the use of biological agents such as viruses, bacteria, fungi, etc.

5. Plant Biotechnology – It deals with development of transgenic plants with resistance to biotic and abiotic stresses; development of haploids, embryo rescue, clonal multiplication, cryopreservation, etc..