What is a genitive disease or athritis?

It seems there may be a typographical error in your question. If you meant "genetic disease," it refers to disorders caused by abnormalities in an individual's DNA, which can be inherited from parents or arise spontaneously. On the other hand, "Arthritis" is an inflammatory condition affecting the joints, leading to pain, swelling, and reduced mobility. There are various types of arthritis, some of which may have genetic components, but they primarily result from a combination of genetic, environmental, and lifestyle factors.