PMID- 33801756 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240401 IS - 2076-2615 (Print) IS - 2076-2615 (Electronic) IS - 2076-2615 (Linking) VI - 11 IP - 4 DP - 2021 Mar 27 TI - Clinical Cytogenetics of the Dog: A Review. LID - 10.3390/ani11040947 [doi] LID - 947 AB - The dog is an important companion animal and has been recognized as a model in biomedical research. Its karyotype is characterized by a high chromosome number (2n = 78) and by the presence of one-arm autosomes, which are mostly small in size. This makes the dog a difficult subject for cytogenetic studies. However, there are some chromosome abnormalities that can be easily identified, such as sex chromosome aneuploidies, XX/XY leukocyte chimerism, and centric fusions (Robertsonian translocations). Fluorescence in situ hybridization (FISH) with the use of whole-chromosome painting or locus-specific probes has improved our ability to identify and characterize chromosomal abnormalities, including reciprocal translocations. The evaluation of sex chromosome complement is an important diagnostic step in dogs with disorders of sex development (DSD). In such cases, FISH can detect the copy number variants (CNVs) associated with the DSD phenotype. Since cancers are frequently diagnosed in dogs, cytogenetic evaluation of tumors has also been undertaken and specific chromosome mutations for some cancers have been reported. However, the study of meiotic, gamete, and embryo chromosomes is not very advanced. Knowledge of canine genome organization and new molecular tools, such as aCGH (array comparative genome hybridization), SNP (single nucleotide polymorphism) microarray, and ddPCR (droplet digital PCR) allow the identification of chromosomal rearrangements. It is anticipated that the comprehensive use of chromosome banding, FISH, and molecular techniques will substantially improve the diagnosis of chromosome abnormalities in dogs. FAU - Szczerbal, Izabela AU - Szczerbal I AD - Department of Genetics and Animal Breeding, Poznan University of Life Sciences, 60-637 Poznan, Poland. FAU - Switonski, Marek AU - Switonski M AUID- ORCID: 0000-0003-2539-9508 AD - Department of Genetics and Animal Breeding, Poznan University of Life Sciences, 60-637 Poznan, Poland. LA - eng GR - 2016/23/B/NZ9/03424/National Science Centre/ GR - 508.534.00.0/Statutory fund of the Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Poland/ PT - Journal Article PT - Review DEP - 20210327 PL - Switzerland TA - Animals (Basel) JT - Animals : an open access journal from MDPI JID - 101635614 PMC - PMC8066086 OTO - NOTNLM OT - aneuploidy OT - cancer cytogenetics OT - centric fusion OT - chimerism OT - disorder of sex development OT - freemartinism OT - intersexualism OT - mosaicism OT - reciprocal translocation COIS- The authors declare no conflict of interest. EDAT- 2021/04/04 06:00 MHDA- 2021/04/04 06:01 PMCR- 2021/03/27 CRDT- 2021/04/03 01:09 PHST- 2021/02/27 00:00 [received] PHST- 2021/03/22 00:00 [revised] PHST- 2021/03/22 00:00 [accepted] PHST- 2021/04/03 01:09 [entrez] PHST- 2021/04/04 06:00 [pubmed] PHST- 2021/04/04 06:01 [medline] PHST- 2021/03/27 00:00 [pmc-release] AID - ani11040947 [pii] AID - animals-11-00947 [pii] AID - 10.3390/ani11040947 [doi] PST - epublish SO - Animals (Basel). 2021 Mar 27;11(4):947. doi: 10.3390/ani11040947.