A researcher is staining young mouse embryonic sections for Sox9, a marker of chondroblasts and the earliest stage of cartilage (precursor of future bones). Where will the researcher observe Sox9 staining in these sections?

Question

Quizplus · Accepted Answer

Sox9 is a marker of chondroblasts, which are the precursor cells of cartilage that will go on to form the bones of the body. Therefore, Sox9 staining should be observed in all of the future bones listed, including the bones of the legs (femur and tibia), the bones of the arms (humerus, ulna, and radius), the vertebrae, and the pelvis.

A Researcher Is Staining Young Mouse Embryonic Sections for Sox9