Answer:
A genetic disease is a condition caused by a change or mutation in an individual's DNA. This can be inherited from a person's parents or it can be a new mutation that occurs in the DNA of an individual. Genetic diseases can be caused by a single gene mutation or by a chromosomal abnormality, which is a change in the structure or number of chromosomes.
The main difference between a genetic disease and a disease caused by a pathogen or lifestyle is the source of the condition. A genetic disease is caused by a change in an individual's DNA, while a disease caused by a pathogen is caused by an infection with a bacterium or virus. A disease caused by lifestyle factors, such as smoking or obesity, is the result of environmental influences and individual behavior.
Examples of genetic diseases include cystic fibrosis, sickle cell anemia, and Huntington's disease. Examples of diseases caused by pathogens include the flu, tuberculosis, and malaria.