A collection of particular persons or items, formed into one body; as a corporation aggregate, which is one formed of a number of natural persons; the union of individual charges make an aggregate charge.
Pleiotropy describes the genetic effect of a single gene on multiple phenotypic traits. The underlying mechanism is that the gene codes for a product that is, for example, used by various cells, or has a signaling function on various targets.A classic example of pleiotropy is the human disease phenylketonuria (PKU).nsourced material may be challenged and removed. (September 2013). Pleiotropy occurs when one gene influences two or more seemingly unrelated phenotypic traits, an example being phenylketonuria, which is a human disease that affects multiple systems but is caused by one gene defect.
1 Elements such as carbon, oxygen, phosphorus, tin and sulfur, display allotropy. 2  The different physical properties displayed by allotropes of an element are explained by the fact that the atoms are arranged into molecules or crystals in different ways. is a linear molecule while O 3 is a bent molecule. 2 and O 3 have different physical properties such as colour, odour, melting and boiling point, density and solubility. Some properties of the allotropes of oxygen are shown below: The two most common, naturally occurring allotropes of carbon are graphite and diamond.