A gene whose influence will be expressed only when it is paired with a second gene of the same type is known as a __________ gene

Adolescent awkwardness occurs

A. throughout adolescence B. only during the latter stages of adolescence C. only during the period known as peak height velocity D. only during the middle years of adolescence

Infants born three or more weeks early are called ______; those infants weighing less than they should, given the amount of time that has passed since conception, are called ______

Fill in the blank with correct word