Why is the knowledge of genetics important to understanding disease?

With the knowledge you have gleaned from the videos, address the following in a 2- to 3-paragraph journal assignment:

Why is the knowledge of genetics important to understanding disease?
Why is it important for public health professionals to know about genetics?
Select one type of genetic testing that is available today. Discuss how this type of testing can impact disease.

Be sure to support your response with relevant resources, which should be cited according to APA style.

Cascade Screening video link: https://www.youtube.com/watch?v=VORS9-yzET0

Why should I consider genetic screening video link: https://www.youtube.com/watch?v=WUQ2-n3h5LM