This thesis is explores the scientific indication of genetics in the perspective of prophet tradition (hadīth). Studying genetics is very important because of its huge potential effect. In this knowledge, studied how genetic endowment (heredity) was inherited to posterity and also variation that may arise in it. So, genetics explain various human problematic such as man healthy, physical and mental defect, character inherits, until engineers it.
Some clues that show clearly about the modern science of genetics was basis for review in the Qur’ān and hadīth. So, in this research, the researcher attempts to explore the hadīth to get the understanding about scientific indication of genetic theory in the prophet tradition (hadīth). By collecting some hadīth related to genetics in the kutub al hadith, the researcher wants to get new understanding about how the scientific indication of genetics according prophet tradition (hadīth) and its correlation with sciences, which focusing on the Biology in order to know deep meaning towards never ending scientific miracle of hadīth.
About the understanding hadīth with science, although it has negative impact because the scientific truth is relative and always changing, its also has positive impact because we will get a wider and deeper understanding on the hadīth. Therefor, we know that the statement of hadīth often seem trivial, but if scientifically investigated with the results of modern science would turn out that these statements show the things that later justified by science.
From the research, the writer concludes that hadīth also mentions scientific facts about the law expressed by the genetic inheritance, that is in the sperm of man and ovum of woman. So, we can conclude that Islam is a perfect teaching. Al-Qur’an and hadīth as the main guidance manage all life aspect of Muslim, including the heredity of parent’s characters toward their child. Islam also teaches us to choose good couple from good family, because beside of environment, man characters also determined by genetics. Allah also prohibits man to do inbreeding (marriage with close family) because genetics declares that inbreeding have big possibility caused abnormality or mental deviation