KDM5D rs2032633: Understanding This Y-Chromosome Ancestral Marker
The rs2032633 variant is a specific genetic marker located on the human Y chromosome within the KDM5D gene. It is primarily utilized in population genetics to distinguish the A2 Y-DNA haplogroup, helping researchers map historical human migration patterns.
What each genotype means
Y-DNA Haplogroup A2 marker
This genotype is a specific marker associated with the Y-chromosome haplogroup A2. Because this variant is located on the Y chromosome, it is only present in individuals who are biologically male. This marker is used in population genetics to trace patrilineal ancestry and does not indicate a medical condition or disease risk.
This genotype is found exclusively in individuals belonging to the Y-DNA haplogroup A2, which is primarily observed in specific African populations.
Non-A2 Y-chromosome lineage
This genotype indicates that the Y chromosome does not carry the specific marker associated with the A2 haplogroup at this position. As a Y-chromosome variant, this is only applicable to biological males and serves as a tool for ancestral lineage tracking rather than clinical health assessment.
This genotype is common in the vast majority of the global male population who do not belong to the specific A2 haplogroup.
Non-A2 Y-chromosome lineage
This genotype indicates that the Y chromosome does not carry the specific marker associated with the A2 haplogroup at this position. As a Y-chromosome variant, this is only applicable to biological males and serves as a tool for ancestral lineage tracking rather than clinical health assessment.
This genotype is common in the vast majority of the global male population who do not belong to the specific A2 haplogroup.
What is rs2032633 and Where is it Located?
The variant rs2032633 is a single nucleotide polymorphism (SNP) situated on the Y chromosome. In the human genome, it is located within the KDM5D gene, specifically at position 19,706,840 on the GRCh38 assembly. Because the Y chromosome is passed down from father to son with relatively few changes over generations, specific markers like rs2032633 serve as stable indicators of paternal lineage. This SNP is categorized as an ancestral marker, meaning it helps define the branching points of the human Y-chromosome phylogenetic tree. By identifying which version of this SNP an individual carries, geneticists can classify their Y-DNA into specific haplogroups, which are groups of people who share a common paternal ancestor. It is a tool for understanding deep ancestry rather than a predictor of physical traits or health outcomes.
The Role of the KDM5D Gene
The KDM5D gene, also known as JARID1D, encodes a protein called lysine-specific demethylase 5D. This protein functions as a histone demethylase, an enzyme that modifies the structure of chromatin by removing methyl groups from histone H3 at lysine 4. By altering these chemical marks, KDM5D plays a critical role in regulating gene expression and maintaining genomic stability. Research indicates that KDM5D is involved in processes such as spermatogenesis and the regulation of androgen receptor signaling. Because it is located on the Y chromosome, it is expressed exclusively in males. Some studies have investigated the role of KDM5D as a potential tumor suppressor, noting that its loss or reduced expression may be associated with the progression of certain malignancies, such as prostate or gastric cancer. However, rs2032633 itself is a marker of ancestry and is not typically associated with the functional variations of the KDM5D protein.
Research Associations and Evidence Strength
The evidence linking rs2032633 to the A2 haplogroup is well-established within the field of population genetics. It is widely recognized as a diagnostic SNP for this specific clade, often referred to by the alternative name M49. The association is considered strong for the purpose of ancestral classification, as it reliably distinguishes the derived A2 lineage from the ancestral state. While the KDM5D gene itself is the subject of ongoing medical research regarding its role in cancer biology, the rs2032633 variant is not currently linked to clinical health outcomes or disease risk in the GWAS Catalog or other major clinical databases. It is important to distinguish between the functional role of the KDM5D gene and the use of this specific SNP as a neutral marker for tracing human history. As with all genetic markers, its primary utility remains in the study of human evolution and population structure.
What You Can and Cannot Do With This Information
Understanding your status for rs2032633 can provide interesting insights into your deep paternal ancestry, specifically regarding whether you belong to the A2 Y-DNA haplogroup. This information is a window into the migration patterns of your distant ancestors. However, it is crucial to understand that this variant is not a medical diagnostic tool. It does not provide information about your current health, your risk for developing diseases, or how you might respond to medications. Because this SNP is a neutral marker of ancestry, it should not be used to make decisions about your healthcare or lifestyle. If you have questions about your genetic health or family medical history, the most appropriate course of action is to consult with a qualified healthcare provider or a genetic counselor. They can help you interpret clinical genetic testing results in the context of your overall health and personal medical history.
How common is this variant?
The frequency of rs2032633 is highly variable and depends entirely on the specific population's Y-DNA haplogroup distribution, as it is a marker specific to the A2 lineage.
Frequently asked questions
What is a Y-DNA haplogroup?
A Y-DNA haplogroup is a group of people who share a common paternal ancestor. These groups are defined by specific genetic markers on the Y chromosome that have been passed down through generations.
Does rs2032633 affect my health?
No, rs2032633 is an ancestral marker used to trace lineage. It is not associated with any known health conditions or medical traits.
Can women have the rs2032633 variant?
No, this variant is located on the Y chromosome, which is typically only present in biological males. Therefore, it is not found in females.
How is this SNP used in genealogy?
Geneticists and genealogists use this SNP to determine if a male belongs to the A2 haplogroup. This helps individuals understand their deep paternal ancestral origins.
Sources & further reading
Educational information only, last refreshed 9/21/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs2032633?
Upload a raw DNA file from 23andMe, AncestryDNA, MyHeritage, or FamilyTreeDNA and see this variant — plus thousands more — interpreted in your full report.
Get my report — $29Related variants in KDM5D
Y-chromosomal SNP marker used in phylogenetic studies of human male lineages.
Y-chromosome SNP used to distinguish specific sub-clades within the R1a1a haplogroup.
This Y-chromosome deletion variant is a marker used to define and distinguish Y-DNA haplogroup H1a1a.