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).
Cooperative federalism, or marble cake federalism, is the situation in which the national, state, and local governments work together to solve problems.They could also share expenses, administration, and even liability for programs.ooperative federalism, or marble cake federalism, is the situation in which the national, state, and local governments work together to solve problems. They could also share expenses, administration, and even liability for programs.