Chembeuzi Y (pia: kromosomu Y, kwa Kiingereza Y chromosome) ni moja katika jozi la chembeuzi za jinsia za wanyama wengi kujumuisha mamalia, na kwa hivyo binadamu pia, pamoja na chembeuzi X. Ndizo zinazosababisha mtu kuwa mwanamume au mwanamke, na vilevile wanyama mbalimbali kuwa wa kiume au wa kike. Baba tu ana chembeuzi hiyo (pamoja na ile ya X) na hivyo anaweza kumrithisha mwanae, ambaye kwa njia hiyo atakuwa wa kiume. Kumbe mama ana jozi la chembeuzi X asiweze kurithisha chembeuzi Y. Utafiti unaonyesha kwamba chembeuzi Y ni kati ya sehemu za urithi wa binadamu zinazobadilika zaidi. Genetic Genealogy: About the use of mtDNA and Y chromosome analysis in ancestry testing Ensembl genome browser http://www.ncbi.nlm.nih.gov/mapview/maps.cgi?taxid=9606&chr=Y Human Genome Project Information—Human Chromosome Y Launchpad On Topic: Y Chromosome Archived 8 Mei 2012 at the Wayback Machine.—From the Whitehead Institute for Biomedical Research Nature—focus on the Y chromosome National Human Genome Research Institute (NHGRI)—Use of Novel Mechanism Preserves Y chromosome Genes Ysearch.org – Public Y-DNA database Archived 4 Januari 2011 at the Wayback Machine. Y chromosome Consortium (YCC) Archived 16 Januari 2017 at the Wayback Machine.