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).
The definition of assimilationism is the act of encouraging minority cultural groups to be similar to larger cultural groups. An example of assimilationism is the encouragement by some Americans for those who come to the United States to dress in a similar fashion as Americans. assimilationism the policy of completely absorbing minority cultural groups into the main cultural body, esp. by intermarriage