______________ are conditions that increase the probability of a disorder but are neither necessary nor sufficient to cause it

The most famous sex-linked genetic disorder is ______

Fill in the blank with correct word

According to the article The Nose Knows about the ability of mothers to detect the scent of their babies, in his work with infant monkeys, Harry Harlow found that mother love displayed by the monkeys depended upon:

(a) food rewards (b) contact comfort (c) genetic relationships (d) observing siblings with the mother