/zuy gos"i tee, zi-/, n. Genetics.
1. the characterization of an individual's hereditary traits in terms of gene pairing in the zygote from which it developed. Cf. homozygous, heterozygous.
2. the characterization of twinning and multiple births in terms of the combination of alleles for particular hereditary traits. Cf. monozygotic, dizygotic.
[1945-50; ZYG- + -OSITY or ZYGOS(IS) + -ITY]

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Universalium. 2010.

Look at other dictionaries:

  • Zygosity — refers to the genetic condition of a zygote. In genetics, zygosity describes the similarity or dissimilarity of DNA between homologous chromosomes at a specific allelic position or gene. The terms homozygous, heterozygous and hemizygous are used… …   Wikipedia

  • zygosity — noun Etymology: probably from zygous Date: 1946 the makeup or characteristics of a particular zygote; also the genetic relationship between offspring of a single birth especially in regard to being derived from the same or different zygotes …   New Collegiate Dictionary

  • zygosity — noun The quality or characteristics of a zygote See Also: zygose, zygosis, zygospere, zygospore, zygotene, zygotic, zygotically, zygous …   Wiktionary

  • zygosity — The nature of the zygotes from which individuals are derived; e.g., whether by separation of the division of one zygote (monozygotic), in which case they will be genetically identical, or from two separate fertilized ova (dizygotic). * * *… …   Medical dictionary

  • -zygosity — zy·gos·i·ty a word termination denoting relationship to the zygote …   Medical dictionary

  • zygosity —    Twin development from on or two zygotes. If one, the twins are identical (monozygotic); if two, they are fraternal (dizygotic) …   Forensic science glossary

  • zygosity — zy·gos·i·ty …   English syllables

  • zygosity — zy•gos•i•ty [[t]zaɪˈgɒs ɪ ti, zɪ [/t]] n. 1) gen the characterization of a hereditary trait in an individual according to whether the gene pairs for the trait are homozygous or heterozygous 2) dvl the characterization of twins, triplets, etc.,… …   From formal English to slang

  • zygosity — ˈgäsəd.ē noun ( es) Etymology: New Latin zygosis + English ity : zygotic quality or characteristics : specific inheritance …   Useful english dictionary

  • Twin — Monozygotic ( identical ) twins A twin is one of two offspring produced in the same pregnancy.[1] Twins can either be monozygotic (in common parlance, identical ), meaning that they develop from one zygote that splits and forms two embryos, or… …   Wikipedia

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