The meaning of biometric information

Biometric information is the information about a specific or individual person's body.  Hair colour and height are simple examples of biometric information.  However for identification and recognizing purposes hair colour and height are not very useful information because they change relatively rapidly and quickly (hair colour is changed by dye, colour, by sunshine or by age; a person's height varies throughout the day according to the pressure on the spine).  For identification or recognizing  purposes the most well known type of biometric information is the fingerprint, these are used because it is believed that no two people have the same patterns in the skin of their fingers and the patterns are relatively constant and unchanged ; they might change a little bit as a person gains or loses weight but the patterns remain recognisable and unique.  Another commonly used form of biometric information is DNA sequences.  DNA is the biological code that is present in every cell of the human body and that describes each individual person.