This can lead to serious genetic defects. Another medical reason is to have information about the adopted child's genetic inheritance that will help them stay healthy and deal effectively with any inherited medical difficulty that might arise in the course of their life. These are rare but real situations. All of these are excellent reasons for knowing who your biological parents are. Now let's examine kabud av v'aym.
Jewish tradition teaches that the adoptive parent is to be praised.
However, according to Halakha, adoption does not constitute a blood relationship. Jewish law focuses entirely on natural relationships to establish parental rights and duties. From the halakhic sources I've seen, you would not be breaking the mitzvah of kabud av v'aym, by looking for your biological parents. However, the way you go about it will make all the difference in the world in your relationship with them. You can show respect for your adoptive parents by honestly, sensitively discussing your feelings with them first.