Complex sentence: Genetic testing, also known as DNA testing, allows the genetic diagnosis of vulnerabilities to inherited diseases, and can also be used to determine a child's parentage (genetic mother and father) or in general a person's ancestry or biological relationship between people.
Split into simpler sentences: Genetic testing, also known as DNA testing, allows the the determination of bloodlines and the genetic diagnosis of vulnerabilities to inherited diseases. In humans, genetic testing can be used to determine a child's parentage (genetic mother and father) or in general a person's ancestry or biological relationship between people.