Genes are short sections of DNA that determine an animal’s traits—everything from coat color and claw strength to body shape and health. But sometimes, these genes mutate. And while the word itself ...

Tumors can develop anywhere cells are present (i.e., essentially anywhere in the body), and they are classified as benign or ...

A vast mosaic of cells, some that are identical and some that are slightly different, make up the human body. Knowable Magazine You began when egg and sperm met, and the DNA from your biological ...