Wool Biology and Metrology cover the molecular structure of the wool fibre, wool follicle formation and cellular and molecular processes. The characteristics of wool follicles and fibre are related to aspects of wool measurement or metrology and its effect on sheep selection, prediction formulae and processing performance. The unit explains the procedures and measurements involved to objectively specify the Australian wool clip. This unit supplements topics introduced in WOOL482 and WOOL582. WOOL572 is based on WOOL472 with an extra assessment expecting a greater level of understanding of the unit material.