Which of the following statements about gender is TRUE?
◦ Before toddlerhood, it is only in Western cultures that people communicate gender expectations to boys and girls.
◦ In the early years, it is mainly siblings who convey cultural gender messages.
◦ Gender development has a biological basis as well as an environmental basis.
◦ Many of the differences that exist among male and female humans are not true of our closest primate and mammalian relatives.