Age - the length of life or existence (years old);
Gender - comprise of Masculine (Male) and Feminine (Female), it's to classified the classes of two sexes, for eg.
the Masculine gender for:-
1) auntie will be uncle;
2) waitress will be waiter;
3) lioness will be lion; and
the feminine gender for:-
1) grandfather will be grandmother;
2) king will be queen;
3) fox will vixen;