Which of the following is NOT a type of identity testing for genetic disorders?

The choice that is not a type of identity testing for genetic disorders is multipoint mapping. This technique is primarily used for genetic linkage analysis rather than direct identity testing. Multipoint mapping helps in determining the positions of genes on a chromosome based on the recombination frequency between markers. It is a valuable tool for mapping genetic traits but does not provide information on individual identity concerning genetic disorders.

In contrast, short tandem repeats (STRs) are widely used in identity testing, particularly in forensic DNA profiling and paternity testing. They are highly polymorphic and provide a reliable means of distinguishing between individuals.

Long interspersed nucleotide sequences (LINEs) are another genetic element that can be analyzed to assess variation among individuals, particularly in certain research applications.

Single nucleotide polymorphisms (SNPs) represent the most common form of genetic variation among individuals and are often used for both identity testing and population genetics studies. They serve as important markers in identifying genetic disorders and in personal genomics.

Thus, multipoint mapping is distinct from identity testing, which focuses on the direct analysis of individual genetic markers.