Human Genetics provides an insight into the basic human genetics, common genetic disorders, the inheritance pattern, the genetic basis for the diseases, the sensitive periods in human development, the detection of the diseases and the mechanism of genetic variation and deals with the heritable nature of most of the diseases. This book highlights the human genome project with its social implications. The proposed model for human cloning and stem cells as 21st century medicine for genetic diseases and describes the process of genetic counseling and the treatment methods undertaken in dealing with the genetic disorders. The ethical issues related to genetic counseling are also presented.