Introduction to Psychology 10th Edition by Rod Plotnik,Haig Kouyoumdjian

تمرين 17

A fertilized egg, which is called a (a) _____, contains 46 chromosomes arranged in 23 pairs. A hairlike structure that contains tightly coiled strands of the chemical DNA (deoxyribonucleic acid) is called a (b) _____. A specific segment on the strand of DNA that contains instructions for making proteins is called a (c) _____.