X-rays - nibib.nih.gov
www.nibib.nih.gov › science-topics › x-raysX-rays are a form of electromagnetic radiation, similar to visible light. Unlike light, however, x-rays have higher energy and can pass through most objects, including the body. Medical x-rays are used to generate images of tissues and structures inside the body. If x-rays travelling through the body also pass through an x-ray detector on the ...
X Inactivation - Biology | Socratic
socratic.org › biology › genetics-inheritanceDec 18, 2014 · Females have two X chromosomes in each cell except the sex cells. Only one is expressed and the other in activated. It has a transcriptionally inactive structure called heterochromatin. This inactivated X is also called the Barr Body. It can be seen microscopically and is used to identify if a person competing in sports is female.