Research To Date Has Shown: 1  ADHD is a neurobiologic condition whose symptoms are also dependent on the child's environment. 2  A lower level of activity in the parts of the brain that control attention and activity level may be associated with ADHD. 3  ADHD frequently runs in families.
Mosaic (genetics) In genetics, a mosaic (or mosaicism) means the presence of two different genotypes in an individual which developed from a single fertilized egg. As a result, the individual has two or more genetically different cell lines derived from a single zygote. Unusual events in cell division (mitosis).
Mosaic law definition. The law that, according to the Old Testament, God gave to the Israelites through Moses. The Mosaic law begins with the Ten Commandments and includes the many rules of religious observance given in the first five books of the Old Testament. In Judaism, these books are called the Torah, or âthe Law.â.