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How do haplotypes help scientists search for genes connected to disease?

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Diagram of a DNA double helix showing its twisted ladder structure, with a close-up of the sugar-phosphate backbone, paired nitrogenous bases (adenine, thymine, cytosine, guanine), and labeled nucleotides and hydrogen bonds. — human genome The human genome is made up of approximately three billion base pairs of deoxyribonucleic acid (DNA). The bases of DNA are adenine (A), thymine (T), guanine (G), and cytosine (C).

Haplotypes are sets of alleles or genetic variations located close together on a single chromosome that tend to be inherited as a unit.12

Scientists use haplotypes to search for genes connected to human disease because analyzing millions of individual single nucleotide polymorphisms (SNPs) across the human genome is highly inefficient. By identifying haplotype regions, researchers can use a few "tag" SNPs to represent the entire region, allowing them to quickly screen for associations between specific genetic variants and health conditions like cancer or heart disease.1

While this research is vital for developing diagnostic tools and new drugs, it carries significant ethical weight. It is imperative that such data be used to promote health equity and prevent the stigmatization or discrimination of ethnic groups, as the pursuit of scientific knowledge must always be balanced with the fundamental right to social and occupational equality.1