If a pair of alleles contains one dominant gene and one recessive gene, the pair is __________

Many theorists believe that important aspects of the acquisition of grammar are biologically predetermined. To determine what knowledge is innate, it has been especially helpful to design cross-linguistic studies of

a. how quickly children enter the naming explosion phase. b. whether children are referential or expressive in their language usage. c. what is hard and what is easy for children to acquire. d. the match between adults' and children's styles across many languages.

According to Freud's theory of personality development, there are __________ psychosexual stages through which each person must pass

a) 3 b) 5 c) 7 d) 8