How To Use Zygotic In A Sentence
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Of 5,597 monozygotic twin pairs where both were alive and had provided usable responses to CFS screening questions, we identified 140 pairs of twins who met preliminary inclusion criteria: born 1935-1985, classified as a monozygotic twin based on questionnaire responses
PLoS ONE Alerts: New Articles
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The presence of a high concordance for the CA-hypersensitive phenotype, observed also in dizygotic twins, strongly influenced the correlation coefficients for CA.
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These findings represent one of the first studies to identify a protein that plays a role in mediating both a postmating, prezygotic isolation pathway and reproductive senescence.
ScienceBlogs Channel : Physical Science
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The chance of getting dizygotic twins increases with the age and the number of births that the mother has given, so it's not so strange that when you've got 6 kids along comes another pair of twins.
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Like dizygotic twins, ordinary siblings also share approximately half of their genes; genetically, dizygotic twins are ordinary siblings.
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A trait or disease is called heritable if monozygotic twins are more similar to each other than dizygotic twins.
PhysOrg.com - latest science and technology news stories
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The second has a couple of good paragraphs on how heterozygotic copies of bad genes can confer evolutionary advantages I told you I was going somewhere with this.
"Sicker than a Doorknob"
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The incidence of identical twins (or monozygotic, meaning they come from one fertilised egg) remains constant across ages and populations.
Times, Sunday Times
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When prenatal environment is similar for monozygotic twins they will possess nearly identical finger ridge configuration.
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The researchers tested for genetic influences by comparing the experiences of monozygotic twins, who share all their genes, and dizygotic twins, who share considerably fewer genes.
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It is the sperm basal body that serves as a centriole in the zygotic microtubule organizing center.
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As starting material they used normal zygotic embryos from which callus cultures were established.
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Because monozygotic twins presumably have identical genes, any dermatoglyphic differences between them must be due to differences in prenatal environmental experiences.
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For the correlation analysis, 20 unrelated couples were formed by randomly matching one monozygotic twin with one dizygotic twin.
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Several gametic and zygotic reproductive barriers were found in a cross between Japonica and Indica rice varieties.
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These reports indicate concordance rates of over 50% for monozygotic twin pairs compared with under 10% for dizygotic twins.
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I would posit that the low-lifespan-after-senescence-onset would likely have a similar effect -- heterozygotic organisms (and maybe the homozygotes too) may have an advantage in terms of metabolism or ability to reproduce or something.
Boing Boing
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Monozygotic twins , on the other hand , arise from the same fertilized egg.
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That's about 450 is the US units. 600 has been recorded (rarely) amongst people with the heterozygotic (1 copy) form of the mutation, and nearly double that for homozygotes (2 copies).
Archive 2005-05-01
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Two well conducted and well controlled studies show that refractive errors are much more strongly correlated in monozygotic twins than in dizygotic twins.
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Cells from new zygotic colonies were resuspended in 1 ml water and appropriate dilutions were made.
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The proembryo from zygotic cell divisions may be divided into three parts: proper , hypoblast and suspensor.
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monozygotic twins
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Three-banded armadillos developed a unique antipredator strategy by entirely rolling up into a ball, and nine-banded armadillos are the only vertebrates to reproduce by obligate monozygotic polyembryony.
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dizygotic twins
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In the switched-baby cases Ms. Segal discusses, it is highly unlikely that the error would have been discovered were it not for the fact that the twins were monozygotic and thus had a striking physical resemblance.
Separated At Birth. Really.
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A large fraction of the genes identified in both the zygotic and the maternal screens affect either the anteroposterior or the dorsoventral axis.
Nobel Lecture The Identification Of Genes Controlling Development In Flies And Fishes
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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.
VDARE.com: Blog Articles » Print » Is Facial Recognition A Non-g Factor Mental Module?
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The concordance rate of obsessive-compulsive disorder is also higher for monozygotic twins than it is for dizygotic twins which suggest that there is a genetic component to this disease.
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These reports indicate concordance rates of over 50% for monozygotic twin pairs compared with under 10% for dizygotic twins.
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The mother assumed that she had given birth to fraternal twins (dizygotic, from two eggs) and not "identical" ones (monozygotic, two embryos developed from a single fertilized egg).
Separated At Birth. Really.
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Only 6% of zygotic cells complete meiosis and sporulate.
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Obviously, the twins resulting from superfecundation are dizygotic.
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And most of us have probably ingested meat and dairy products from livestock cloned by natural reproduction (monozygotic siblings), mechanical embryo-splitting or even nuclear transfer from an embryonic donor cell into an enucleated oocyte.
The Cloned Cow Has Left the Barn
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The mother assumed that she had given birth to fraternal twins (dizygotic, from two eggs) and not "identical" ones (monozygotic, two embryos developed from a single fertilized egg).
Separated At Birth. Really.
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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.
Genetics and the Future of Religion, Bryan Caplan | EconLog | Library of Economics and Liberty
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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 [2], and the composite-face effect [3].
Is Facial Recognition A Non-g Factor Mental Module?
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Twin studies have shown that the incidence of asthma is significantly higher in monozygotic twins than dizygotic twins 27-29.
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One thousand and seventy three pairs of adult monozygotic (MZ) twins and 895 pairs of same sex adult dizygotic (DZ) twins from the United Kingdom (UK) completed the Humor Styles Questionnaire: a 32-item measure which assesses two positive and two negative styles of humor.
Archive 2008-08-01
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Drying rates also affect the desiccation tolerance of somatic embryos and immature zygotic embryos or seeds.
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Although these phenotypes and their resulting dynamics are important, we have little understanding of the proteins that mediate these phenotypes, particularly for species groups where postmating, prezygotic traits are the primary mechanism of reproductive isolation.
ScienceBlogs Channel : Physical Science
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From twin studies, the concordance rate is estimated at 57 percent for monozygous twins and 14 percent for dizygotic twins.
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Yet little is known about the genetic basis of postmating prezygotic isolation barriers between species.
BioMed Central - Latest articles
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Zygotic embryogenesis in animals and plants starts with the fusion of the haploid female and male gametes, giving rise to a diploid zygote.
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HETEROZYGOTE (different yolk), a zygotic individual which contains both members of an allelomorphic pair.
Applied Eugenics
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The one success was our third patient, a dizygotic twin who received a sublethal, non-marrow requiring, dose of total body X-ray, given by Dr. James B. Dealy, followed by a kidney graft from his twin brother in 1959.
Joseph E. Murray - Nobel Lecture
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When sex determination is under zygotic control, the probability of an individual being male depends upon its genotype rather than that of its mother.
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Dizygotic twins arise from two separate eggs fertilized by two spermatozoa.
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A third of candidate genes within these two loci are located in the 89B cytogenetic position, highlighting a possible major role for this chromosome position during the evolution of species specific adaptations to postmating prezygotic reproductive challenges.
BioMed Central - Latest articles
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Seeds consist of three parts with different genetic compositions: the embryo and endosperm of zygotic origin and the seed coat or testa derived from maternal tissues.
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However, these studies may have overestimated the effect of genetics if monozygotic twins share exposure to more environmental effects than dizygotic twins do.
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Therefore although I might call them "monozygotic" I wouldn't agree that they were "identical.
Identical Boy-Girl Twins
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Such results can be related to the formation of meiotic trivalent in the hybrids leading to the production of viable aneuploid gametes and post-zygotic elimination of embryos due to chromosomal non disjunction events at meiosis.
The Rise of Human Chromosome 2: Beyond the Deme - The Panda's Thumb
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And most of us have probably ingested meat and dairy products from livestock cloned by natural reproduction (monozygotic siblings), mechanical embryo-splitting or even nuclear transfer from an embryonic donor cell into an enucleated oocyte.
The Cloned Cow Has Left the Barn
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Increasing use of fertility drugs is almost certainly the main cause of the recent increase in dizygotic twinning in most developed countries.
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The monozygotic twin material consisted of both concordant and discordant twin pairs, and some unpaired healthy twins.
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Since this type of dermatoglyphic model is based on an analysis of genetically identical individuals (monozygotic twins), it provides a marker for prenatal environmental causality independent of genetic causality.
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In "A Genetic Study of Male Sexual Orientation," a study that has now achieved almost as much renown as LeVay's, the Northwestern University psychologist Michael Bailey and Boston University's Richard Pillard compared fifty-six "monozygotic" twins (identical twins, from the same zygote, or fertilized egg), fifty-four "dizygotic" (fraternal) twins, and fifty-seven genetically unrelated adopted brothers.
Homosexuality and Biology
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In recent years, a number of studies have brought attention to postmating prezygotic barriers arising from male - male competition and male - female interactions.
BioMed Central - Latest articles
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Dizygotic twins are known by which common name?
Times, Sunday Times
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Hamburger group in Paris subsequently ad a similar success with a dizygotic twin recipient following sublethal X-ray treatment.
Joseph E. Murray - Nobel Lecture
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And most of us have probably ingested meat and dairy products from livestock cloned by natural reproduction (monozygotic siblings), mechanical embryo-splitting or even nuclear transfer from an embryonic donor cell into an enucleated oocyte.
The Cloned Cow Has Left the Barn
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The numbers of explants showing germination of zygotic embryos, callus formation and somatic embryogenesis were recorded every 4 weeks.
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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).
EconLog: Economic Methods Archives
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First we examined the cuticles of the dead embryos/larvae, looking for an example of lateral spacing defects observed in aos zygotic mutants, but found no obvious abnormalities (data not shown).
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It arises in one individual but spreads in population in heterozygotic form, untill in becomes frequent enough to produce homozygotic mutants people who inherited it from both parents.
Just call him/her Ol’ Blue Eyes
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Dizygotic twins are known by which common name?
Times, Sunday Times
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Lethality is observed only when both the maternal and the zygotic contributions are completely removed.
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Classical liberals (libertarians, basically) accept that only monozygotic twins are “created equal” and that even these will diverge as they mature.
The Volokh Conspiracy » 4. On a Bus in Kiev
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But births of monozygotic twins are rare, roughly one in 300.
Separated At Birth. Really.
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An obvious question is whether the mat bias is absent in azygotic meiosis after homologous chromosomes have coexisted in diploid cells for many mitotic divisions.
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If gametic and/or zygotic selection occurs whereby certain gametes or zygotic combinations have a reduced chance of survival, progeny distributions are skewed and are said to exhibit segregation distortion.
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Another result concerning handedness of the progeny of discordant monozygotic twins suggests that lefties are one gene apart from righties.
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Here, we utilize proteomics, RNAi, mating experiments, and the Allonemobius socius complex of crickets, whose members are primarily isolated from one another by postmating, prezygotic phenotypes
ScienceBlogs Channel : Physical Science
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The sperm and egg pronuclei form the zygotic nucleus.
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The asymmetric zygotic division fixes polarity, which may rely on the asymmetric delivery of cell wall components, possibly AGPs, and which requires GN in order to execute it.
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There are many instances recorded in Earth history of apparent telepathic links between monozygotic twins, but fewer of such links between heterozygotic twins, who are born together but are genetically different.
Spock Must Die
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To experimentally measure this distribution requires either an asexual organism or a sexual line that is genetically homogeneous (homozygotic at each locus).
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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.
Archive 2008-03-01
