This book bring the basic concept in the area of genetics, will be useful to student of pharmacy, medical and paramedical branches.Concept of stem cell and cell line provides clear introduction about how the targeted and advance therapy works in curative and palliative treatment of various diseases.Stem cell biology has a great potential in saving many lives. Stem cell research lies on embryo cells or adult stem cells because they can grow into all types of cells and tissues in the body.It can cure many diseases like Parkinson's and Alzheimer's disease, osteoarthritis, rheumatoid arthritis, malignancies, inborn errors of metabolism, Diabetes and many more. Using Stem cell and cell line therapy, organ donations could be reduced in favor of introducing new cell grown in lab instead of new organs from living or recently deceased donors.