dizygotic twins.    From Wordnet, Princeton University. 

This thread in the story involves the biological phenomena of monozygotic and dizygotic twinning.    From Wordnik.com.  [Joseph E. Murray - Nobel Lecture] Reference

Half the men on the list were monozygotic or identical twins; the other half being dizygotic or nonidentical twins.    From Wordnik.com.  [Soul] Reference

It is also supported by twin studies that indicate a greater degree of like diagnoses (concordance) in monozygotic than in dizygotic twins (about 40% versus 10%).    From Wordnik.com.  [The Neuropsychiatric Guide to Modern Everyday Psychiatry] Reference

In most twin studies, the twins themselves (or their parents) report "twin type" - i.e., whether the twins are identical (monozygotic/MZ) or fraternal (dizygotic/DZ).    From Wordnik.com.  [EconLog: Economic Methods Archives] Reference

In this article, we report the results of two independently conceived and executed studies of monozygotic and dizygotic twins, one in Sweden and one in the United States.    From Wordnik.com.  [Archive 2008-03-01] Reference

Bailey and Pillard reported a gay-gay concordance rate of 11 percent for the adoptive brothers, 22 percent for the dizygotic twins, and 52 percent for the monozygotic twins.    From Wordnik.com.  [Homosexuality and Biology] Reference

In contrast, we present here evidence for cognitive “specialist genes”: monozygotic twins are more similar than dizygotic twins in the specific cognitive ability of face perception.    From Wordnik.com.  [Is Facial Recognition A Non-g Factor Mental Module?] Reference

The experiment I have just described1 can be thought of as an artificial reproduction of an astonishing natural curiosity, the phenomenon of red-cell chimerism in certain dizygotic twins.    From Wordnik.com.  [Peter Medawar - Nobel Lecture] Reference

In studying nonmendelian characters (Chapter 19), and sometimes in genetic counseling, it is important to know whether a pair of twins are monozygotic (MZ, identical) or dizygotic (DZ, fraternal).    From Wordnik.com.  [Archive 2004-12-01] Reference

Twin studies make the following assumptions: Monozygotic, (identical), twins share all their genes and their environment but dizygotic, (fraternal), twins share half their genes and their environment.    From Wordnik.com.  [Heritability] Reference

A study published in the current issue of Journal of Personality studied adult male monozygotic (MZ) and dizygotic (DZ) twins to find that difference in religiousness are influenced by both genes and environment.    From Wordnik.com.  [Genetics and the Future of Religion, Bryan Caplan | EconLog | Library of Economics and Liberty] Reference

Council, showed that most dizygotic cattle twins would accept skin grafts from each other, and that this mutual tolerance was specific, for skin transplanted from third parties was cast off in the expected fashion.    From Wordnik.com.  [Peter Medawar - Nobel Lecture] Reference

Genetic analyses included 744 complete twin pairs (377 monozygotic and 367 dizygotic).    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

Photodamage scores were highly correlated among both monozygotic (identical) and dizygotic.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

Design: We performed a multipoint, nonparametric genome-wide linkage scan of 613 female dizygotic twin pairs.    From Wordnik.com.  [The Journal of Clinical Endocrinology & Metabolism Current Issue] Reference

A trait or disease is called heritable if monozygotic twins are more similar to each other than dizygotic twins.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

Liberalism and hypocrisy are dizygotic twins; they don't always look the same, but they are clearly closely related.    From Wordnik.com.  [Latest Articles] Reference

In dizygotic twins (derived from two separately fertilized eggs), 7.7 percent with an affected twin had py­loric stenosis.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

The CAMH study showed that epigenetic factors - acting independently from DNA - were more similar in monozygotic twins than dizygotic twins.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

Traditionally, 'heritability' is estimated by comparing monozygotic (genetically identical) twins to dizygotic (genetically different) twins.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

Where a single dizygotic twin had missing data, or was excluded, the remaining sibling was treated as a singleton in the statistical analysis.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Nautica Oceans is a dizygotic twin of every masculine fragrance you smelled in the 1990s: "fresh," "clean," "sea breeze" and the rest of that decade's marketing adjectives.    From Wordnik.com.  [NYT > Home Page] Reference

A preterm baby girl, first of dizygotic twins, born at 26 weeks of gestation to a 45 year old mother, was prenatally diagnosed with ventriculomegaly on fetal ultrasonogram.    From Wordnik.com.  [BioMed Central - Latest articles] Reference

In contrast, we present here evidence for cognitive "specialist genes": monozygotic twins are more similar than dizygotic twins in the specific cognitive ability of face perception.    From Wordnik.com.  [ScienceBlogs Channel : Life Science] Reference

Because some studies about dizygotic twins (female / male) "proved" that girls who have a twin brother have been infected with the testosterone of their brother during the pregnancy.    From Wordnik.com.  [Wrong Planet Asperger / Autism Forums] Reference

The researchers 'analysis of data from 749 monozygotic twin pairs and 687 dizygotic twin pairs, aged 8 to 17, and their parents revealed that 19.5 percent of the children had insomnia.    From Wordnik.com. Reference

CAMH's Dr. Art Petronis, head of the Krembil Family Epigenetics Laboratory, and his team conducted a comprehensive epigenetic analysis of 100 sets of monozygotic and dizygotic twins in the first study of its kind.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

Each of three measures of face-specific processing was heritable, i.e., more correlated in monozygotic than dizygotic twins: face-specific recognition ability, the face-inversion effect, and the composite-face effect.    From Wordnik.com.  [ScienceBlogs Channel : Life Science] Reference

In a twin study of face recognition, we found that the correlation of scores between monozygotic twins (0.70) was more than double the dizygotic twin correlation (0.29), evidence for a high genetic contribution to face recognition ability.    From Wordnik.com.  [ScienceBlogs Channel : Life Science] Reference

Of course this is possible … you go about sprouting words like ‘dizygotic’ when you don’t even know what it really means.    From Wordnik.com.  [Peers Into The Lives Of Two Headed Twins] Reference

"identical", twin experience starts with the treatment of bums, the dizygotic (DZ), "non-identical", twin story begins with freemartin cattle.    From Wordnik.com.  [Joseph E. Murray - Nobel Lecture] Reference

The dizygotic twin story starts with John.    From Wordnik.com.  [Joseph E. Murray - Nobel Lecture] Reference