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.
Also known as: registered trademark. On Windows: Hold down the ALT key and type 0174 on the keypad. On Mac OS: Hold down the Option key and press R. In HTML: &reg; or &#174; More symbols in the category: How to type punctuation | How To Type.net.