STR analysis is particularly useful in which of the following?

STR analysis, or Short Tandem Repeat analysis, is a highly effective method used in various applications involving genetic comparison, particularly in forensic investigations and paternity testing. This technique focuses on specific regions in the DNA where short sequences of base pairs are repeated. These repeats can vary in number between individuals, making STR analysis a powerful tool for establishing genetic relationships.

In forensic investigations, STR profiles can be obtained from biological evidence, such as blood, hair, or skin cells found at crime scenes, allowing law enforcement to match samples with suspects or victims. The statistical likelihood of matching STR profiles significantly enhances the validity of forensic evidence, serving as a cornerstone of modern criminal justice.

Similarly, in paternity testing, STR analysis can determine whether a man is the biological father of a child by comparing the STR profiles of the child and the potential father. The child's profile will share specific STR markers with the biological parent, while non-biological relationships will show discrepancies. The precision of STR analysis in determining familial relationships makes it invaluable in legal and personal contexts.

Other options listed do not pertain to STR analysis effectively. Blood type determination is a different method based on ABO and Rh factor systems; analyzing hormone levels relies on biochemical assays, and testing for infectious diseases typically uses PCR or