Gizela, while visiting her sister and her newborn nephew, could not help but pick up the baby when he began to cry. According to Bowlby, the baby's crying is an example of a(n)
a. signaling behavior. c. conditioned emotional response.
b. social reference. d. ambivalent attachment.
Question 2
A phenotypic characteristic influenced by two or more genes is a ________ trait.
a. polygenic c. recessive
b. polydominant d. cooperative