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 is a decorative art involving coloured small pieces of glass, stone, minerals, and fragments of pottery or other material.anufacturers gathered the pebbles and used them for floors and footpaths. Greek manufacturers were able to create complex and first-class designs using this simple mosaic technique. They inserted stones on the scale of 1 to 2 cm and filled the outlines with small black pebbles.