Noun gender

Persian is a gender-neutral language. That is, it doesn't distinguish grammatical gender. Therefore, verbs, adjectives and pronouns don't have masculine, feminine or neuter forms. For example, Persian has one word for each of these groups: «he, she, it» (3rd person singular subject pronoun), «him, her, it» (3rd person singular object pronoun), «his, her, its» (3rd person singular possessive pronoun). The fact of being male or female is indicated lexically:

With different words

Sometimes, there are different words for male and female nouns:

khorus — rooster
morgh — hen
mâdiyân — mare, female horse
nowkar — houseman, manservant
kaniz — handmaiden

With adjectives - animals

For animals that are not indicated with different words, the adjectives nar (male) and mâdde (female) can be used to indicate different genders:

shir — lion, lioness
shir-e nar — lion (literally: male lion)
shir-e mâdde — lioness (literally: female lion)
sag — dog
sag-e nar — male dog
sag-e mâdde — female dog

With adjectives - human beings

For human beings that are not indicated with different words, the words mard (man), zan (woman), pesar (boy), dokhtar (girl) can be used to indicate different genders:

polis — police, man or woman
polis-e mard — policeman (literally: man police)
polis-e zan — policewoman (literally: woman police)
bâzigar — actor, actress
bâzigar-e mard — actor (literally: man actor)
bâzigar-e zan — actress (literally: woman actor)
pezeshk — doctor, male or female
pezeshk-e mard — male doctor (literally: man doctor)
pezeshk-e zan — female doctor (literally: woman doctor)
dâneshju — student (of college, university)
dâneshju-ye pesar — boy student
dâneshju-ye dokhtar — girl student