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  • alleles
  • We reasoned that the most likely origin of chimerism with non-inherited paternal HLA alleles was from an unrecognized "vanished" twin. (blogspot.com)
  • Genes
  • Fraternal" or dizygotic (DZ) twins share only about 50% of their genes, the same as any other sibling. (wikipedia.org)
  • Modern twin studies have shown that almost all traits are in part influenced by genetic differences, with some characteristics showing a stronger influence (e.g. height), others an intermediate level (e.g. personality traits) and some more complex heritabilities, with evidence for different genes affecting different aspects of the trait - as in the case of autism. (wikipedia.org)
  • More recent study is from Sir Francis Galton's pioneering use of twins to study the role of genes and environment on human development and behavior. (wikipedia.org)
  • Similarity
  • They partitioned co-variation amongst relatives into genetic and environmental elements, anticipating the later work of Fisher and Wright, including the effect of dominance on similarity of relatives, and beginning the first classic-twin studies. (wikipedia.org)
  • prenatal
  • In addition to serving as a guide to or an internal control for the interpretation of prenatal genetic tests, the ability to measure the DNA contribution of an individual fetus of dizygotic twins might also allow one to monitor the well-being of each twin. (thefreedictionary.com)
  • Families
  • By comparing many hundreds of families with twins, researchers can then understand more about the roles of genetic effects, shared environment, and unique environment in shaping behavior. (wikipedia.org)
  • biology
  • Twin research is considered a key tool in behavioral genetics and in content fields, from biology to psychology. (wikipedia.org)
  • similar
  • Twins have been of interest to scholars since early civilization, including the early physician Hippocrates (5th century BCE), who attributed similar diseases in twins to shared material circumstances,[citation needed] and the stoic philosopher Posidonius (1st century BCE), who attributed such similarities to shared astrological circumstances. (wikipedia.org)
  • The monozygotic twins also chose spouses and best friends who were more similar to their co-twins' friends and spouses than did dizygotic twins. (wikipedia.org)
  • Neither result was seen to a similar degree in dizygotic twins, offering strong favour for high genetic aetiology. (wikipedia.org)
  • study
  • Child psychopathology and lower cognitive ability: a general population twin study of the causes of association. (ugent.be)
  • case
  • Although there are few case reports of Brown syndrome in twins, combination of these reports may elucidate the genetic basis of this disease. (biomedcentral.com)
  • Also there are few case reports of Brown syndrome in twins that might be indicative of a possible autosomal dominant or recessive inheritance. (biomedcentral.com)
  • Full
  • I gained 25-30 lbs with my singleton and she was 8 lbs 11 oz so I'm hoping that since I've already gained 30 lbs the twins will be at least 6 lbs each at full term. (mothering.com)
  • evidence
  • RESULTS: There was some evidence for association between DZ twinning and a common intronic BMP15 variant (rs3897937), but this was not significant after correction for multiple testing. (edu.au)
  • family
  • Twins also share many aspects of their environment (e.g., uterine environment, parenting style, education, wealth, culture, community) because they are born into the same family. (wikipedia.org)
  • sister
  • In it, Vonnegut and his sister transform into the Swains ("Neanderthaloid" dizygotic twins). (wikipedia.org)
  • Dr. Swain is a hideous man whose ugliness, along with that of his twin sister Eliza, led their parents to cut them off from modern society. (wikipedia.org)