noun, Genetics. 1. any of several forms of a gene, usually arising through mutation, that are responsible for hereditary variation.
For example: 1  To insert the copyright symbol, press Ctrl+Alt+C. 2  To insert the trademark symbol, press Ctrl+Alt+T. 3  To insert the registered trademark symbol, press Ctrl+Alt+ R.
Inserting a Trademark Symbol on a Macintosh. Open the document which requires the trademark symbol. Select the location in the text where the trademark symbol is to be inserted using the cursor. Hold down the Alt (also known as the option key) and press the 2 key. The trademark symbol will be inserted by the Macintosh system into the selected piece of text.