Option 1 states that genetic screening is the analysis of DNA to check the presence of a particular gene in a person. This means that through genetic screening, scientists can examine a person`s DNA to identify if they have a specific gene or mutation associated with a certain condition or disease. This can be useful in diagnosing genetic disorders, determining genetic predispositions, or identifying carriers of genetic diseases. Genetic screening is a powerful tool in modern medicine and is commonly used in prenatal testing, newborn screening, and in assessing the risk of developing certain diseases later in life.

Option 2 states that genetic screening is the analysis of genes in a population. While genetic analysis at a population level may be used in certain studies or research, genetic screening primarily focuses on individuals and their specific genetic makeup rather than analyzing genes on a larger scale.

Option 3 states that genetic screening is pedigree analysis. Pedigree analysis involves studying the family tree and inheritance patterns to determine the likelihood of inheriting certain traits or disorders. While pedigree analysis can be a component of genetic screening, it is not the sole definition of genetic screening.

Option 4 states that genetic screening is the screening of infertility in parents. Infertility screening primarily involves assessing the reproductive health and potential genetic causes of infertility in individuals or couples, but it