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Initially, chromosome 14 was implicated as a locus of hoarding.

As more studies were performed, this concept became untenable.

Now, we know that there is no single chromosome that can be implicated in the development of hoarding.

Rather, the underlying origin is polygenic, essentially an underlying architecture throughout the brain.

Many years ago, I studied the components of a cell, including its nuclear material. This experience and my recent essay, “Is Hoarding in Our Genes? What a Landmark Twin Study Reveals,” led me to investigate the potential contribution of a chromosomal component to the known genetics of hoarding. What I found is fascinating and worth examining as part of the unfolding story of the origins of hoarding,

Hoarding disorder is often described as if it might be “caused” by a single errant chromosome, but the trajectory of genetic research, from early linkage studies to contemporary twin and genome‑wide studies, points instead to a complex genetic architecture that resists reductionism. The story that begins with chromosome 14 ends, at least for now, with a polygenic finale, one distributed across the genome and filtered through cognition, affect, and experience.

The 2009 OCD (obsessive-compulsive disorder)........

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