Age at which a child can tell gender?

Milestones at 3 years of age( most of these have been asked in previous years) Can tell age gender and recall story Rides tricycle Stands momentarily on one foot Makes a tower of 10 cubes; imitates construction of “bridge” of 3 cubes Copies circle Imitates cross Plays simple games (in “parallel” with other children) Helps in dressing (unbuttons clothing and puts on shoes) Washes hands