{{Details|Twin|the terms "monozygotic" and "dizygotic"}}
AsComo discussedvimos above,a "zygosity"cigosidade canpode betratarse usedno incontexto thedun contextlocus ofxenético aespecífico specific genetic locus (example<ref>Pujol, C.; Messer, S.; Pfaller, M.; Soll, D. (2003). "Drug resistance is not directly affected by mating type locus zygosity in Candida albicans". Antimicrobial agents and chemotherapy 47 (4): 1207–1212. DOI:10.1128/AAC.47.4.1207-1212.2003. PMC 152535. PMID 12654648. [http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=152535].</ref>). InPero additionademais, thea wordcigosidade "zygosity"pode mayutilizarse alsopara bedescribir useda tosemellanza describeou thedesemellanza geneticxenética similaritydos or dissimilarity of twins[[xemelgo]]s. <ref>[http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=hmg Human Molecular Genetics], 2nd edition by Tom Strachan and Andrew P. Read [http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=hmg&part=A2178#A2306 Chapter 17]. (1999).</ref> IdenticalOs twinsxemelgos areidénticos dise que son '''monozygoticmonocigóticos''', meaningxa thatque theyse developorixinaron froma onepartir zygotedun thatúnico splits[[cigoto]], andque se dividiu orixinando dous formsembrións twoxeneticamente embryosidénticos. FraternalOs twinsxemelgos arefraternos dise que son '''dizygoticdicigóticos''' becauseporque theyse developdesenvolveron froma twopartir separatede eggscigotos thatdistintos arefertilizados fertilized by two separatepor [[spermespermatozoide]]s distintos.
