What is Gender in nouns ? How many types are there with examples?

 What is Gender in nouns ? How many types are there with examples? 

Gender :

 Definition:

what we call sex in Biology we call gender in Grammar.

1: Masculine gender:

 It referred to male gender.

 for example:

 boy ,man, father ,son etc .

2: Feminine gender:

 It refer to female gender.

 for example:

 girl ,mother, daughter ,sister etc.

3: Common gender:

 It involves both male and female sexes.

 for example:

 child ,person ,teacher, doctor, student etc.

4: Neuter gender:

 Its refer to inanimate things non living.

 for example:

 chair ,table ,room ,fan etc .