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.
Press and hold the ALT key and type the number 0153 to make a trademark symbol alt code.ress and hold the ALT key and type the number 0153 to make a trademark symbol alt code.