Sentences with phrase «for gametes»

Contrastingly, pollen is essential for the plants» reproduction, serving as a vehicle for gametes.

With other feminists, I believe that we must consider the likelihood a) that countries with less stringent guidelines for ova donation will proceed more efficiently with research; b) that countries in the one - third world will likely benefit from research using ill - gotten gametes; and c) that advocates for ESCR will argue that, for the sake of justice, the U.S. needs to implement more liberal guidelines for gamete procurement so as to avoid the injustice inherent in situation b).

Not exact matches

For example, a few mutations in a critical binding pocket within the gamete receptors (the proteins that allow a male gamete to adhere to a female gamete) of various invertebrate marine organisms (these organisms simply discharge their gametes into the water in a blind shotgun mating strategy) can produce a reproductive isolation event between subpopulations.

There are a few points in the book in which it would appear that the authors depart from their own sense of what is licit and illicit out of deferrence to certain academic Catholic bioethicists who persist in arguing for the permissibility of so - called «borderline» assisted reproductive techniques such as Gamete Intra Fallopian Transfer (GIFT) and Artificial Insemination by Husband (AIH) or insist that the Church may still allow for so - called embryo adoption.

For the derivation and use of ES cells, there must be informed consent from the donors of surplus human embryos, gametes, or cells.

«The strategy that wtf selfish genes employ is to poison all the developing gametes, but then keep the antidote for themselves,» says Zanders, a Stowers assistant investigator.

Most citrus trees, for example, can form embryos from the tissues surrounding the unfertilized gametes — a feat no animal can manage.

They have spent more than a decade piecing together the subtle details of mammalian gamete production and then recreating that process in vitro — all for the sake of science, not medicine.

As part of these ongoing research activities, the DNA of Dravet patients without SCN1A mutations was analyzed by trio exome sequencing, which searches across the active parts of the genome for de novo mutations that have arisen in these patients (de novo mutations are DNA copying errors that occur in the parents» gametes or in the fertilized egg or embryo, resulting in the afflicted family member being the first person in their family to have this genetic condition).

The board is supposed to make sure no one is harmed by the research, including gamete donors who might not like their embryos used for research.

A huge cloud of gametes released from a reef can float for miles, and when it lands creates genetically new offspring.

When the researchers looked at the gametes themselves, they found that the more promiscuous the species, the longer the hook, increasing the potential for teamwork among related sperm.

Pruitt says RNA «templates» derived from the original gene and stored in the gametes are the best candidates for reverting the mutant gene to its original state.

Not only do many of the ethical challenges posed by embryonic stem cells remain, but the relative ease and low cost of iPS techniques, combined with the accessibility of cells, accelerate the need to address futuristic - sounding possibilities such as creating gametes for reproduction.

To make sure the gametes work normally, for instance, researchers will need to grow embryos and then destroy them, a morally contentious practice with prohibitions and policies differing around the world.

Donors might share in some monetary rewards and be able to opt out of certain uses for iPS cells, such as for creating gametes or mixed species, or have a say in the overall direction of research, Solbakk suggested.

Double fertilization of the female gametes triggers an unusual cell fusion, followed by specific cell disorganization that inactivates the cell responsible for attracting pollen tubes.

«Organisms have a limited budget for producing gametes.

He derived a prediction from an existing mathematical model of the Disruptive Selection Theory that states that for the evolution of males and females to remain stable, the ratio of the size of the larger gamete to the smaller gamete has to be greater than three.

How oocytes, the maternal gametes, lose centrioles and the importance of doing so for female fertility has been an enigma since the 1930s.

g (acceleration due to gravity) G (gravitational constant) G star G1.9 +0.3 gabbro Gabor, Dennis (1900 — 1979) Gabriel's Horn Gacrux (Gamma Crucis) gadolinium Gagarin, Yuri Alexeyevich (1934 — 1968) Gagarin Cosmonaut Training Center GAIA Gaia Hypothesis galactic anticenter galactic bulge galactic center Galactic Club galactic coordinates galactic disk galactic empire galactic equator galactic habitable zone galactic halo galactic magnetic field galactic noise galactic plane galactic rotation galactose Galatea GALAXIES galaxy galaxy cannibalism galaxy classification galaxy formation galaxy interaction galaxy merger Galaxy, The Galaxy satellite series Gale Crater Galen (c. AD 129 — c. 216) galena GALEX (Galaxy Evolution Explorer) Galilean satellites Galilean telescope Galileo (Galilei, Galileo)(1564 — 1642) Galileo (spacecraft) Galileo Europa Mission (GEM) Galileo satellite navigation system gall gall bladder Galle, Johann Gottfried (1812 — 1910) gallic acid gallium gallon gallstone Galois, Évariste (1811 — 1832) Galois theory Galton, Francis (1822 — 1911) Galvani, Luigi (1737 — 1798) galvanizing galvanometer game game theory GAMES AND PUZZLES gamete gametophyte Gamma (Soviet orbiting telescope) Gamma Cassiopeiae Gamma Cassiopeiae star gamma function gamma globulin gamma rays Gamma Velorum gamma - ray burst gamma - ray satellites Gamow, George (1904 — 1968) ganglion gangrene Ganswindt, Hermann (1856 — 1934) Ganymede «garbage theory», of the origin of life Gardner, Martin (1914 — 2010) Garneau, Marc (1949 ---RRB- garnet Garnet Star (Mu Cephei) Garnet Star Nebula (IC 1396) garnierite Garriott, Owen K. (1930 ---RRB- Garuda gas gas chromatography gas constant gas giant gas laws gas - bounded nebula gaseous nebula gaseous propellant gaseous - propellant rocket engine gasoline Gaspra (minor planet 951) Gassendi, Pierre (1592 — 1655) gastric juice gastrin gastrocnemius gastroenteritis gastrointestinal tract gastropod gastrulation Gatewood, George D. (1940 ---RRB- Gauer - Henry reflex gauge boson gauge theory gauss (unit) Gauss, Carl Friedrich (1777 — 1855) Gaussian distribution Gay - Lussac, Joseph Louis (1778 — 1850) GCOM (Global Change Observing Mission) Geber (c. 720 — 815) gegenschein Geiger, Hans Wilhelm (1882 — 1945) Geiger - Müller counter Giessler tube gel gelatin Gelfond's theorem Gell - Mann, Murray (1929 ---RRB- GEM «gemination,» of martian canals Geminga Gemini (constellation) Gemini Observatory Gemini Project Gemini - Titan II gemstone gene gene expression gene mapping gene pool gene therapy gene transfer General Catalogue of Variable Stars (GCVS) general precession general theory of relativity generation ship generator Genesis (inflatable orbiting module) Genesis (sample return probe) genetic code genetic counseling genetic disorder genetic drift genetic engineering genetic marker genetic material genetic pool genetic recombination genetics GENETICS AND HEREDITY Geneva Extrasolar Planet Search Program genome genome, interstellar transmission of genotype gentian violet genus geoboard geode geodesic geodesy geodesy satellites geodetic precession Geographos (minor planet 1620) geography GEOGRAPHY Geo - IK geologic time geology GEOLOGY AND PLANETARY SCIENCE geomagnetic field geomagnetic storm geometric mean geometric sequence geometry GEOMETRY geometry puzzles geophysics GEOS (Geodetic Earth Orbiting Satellite) Geosat geostationary orbit geosynchronous orbit geosynchronous / geostationary transfer orbit (GTO) geosyncline Geotail (satellite) geotropism germ germ cells Germain, Sophie (1776 — 1831) German Rocket Society germanium germination Gesner, Konrad von (1516 — 1565) gestation Get Off the Earth puzzle Gettier problem geyser g - force GFO (Geosat Follow - On) GFZ - 1 (GeoForschungsZentrum) ghost crater Ghost Head Nebula (NGC 2080) ghost image Ghost of Jupiter (NGC 3242) Giacconi, Riccardo (1931 ---RRB- Giacobini - Zinner, Comet (Comet 21P /) Giaever, Ivar (1929 ---RRB- giant branch Giant Magellan Telescope giant molecular cloud giant planet giant star Giant's Causeway Giauque, William Francis (1895 — 1982) gibberellins Gibbs, Josiah Willard (1839 — 1903) Gibbs free energy Gibson, Edward G. (1936 ---RRB- Gilbert, William (1544 — 1603) gilbert (unit) Gilbreath's conjecture gilding gill gill (unit) Gilruth, Robert R. (1913 — 2000) gilsonite gimbal Ginga ginkgo Giotto (ESA Halley probe) GIRD (Gruppa Isutcheniya Reaktivnovo Dvisheniya) girder glacial drift glacial groove glacier gland Glaser, Donald Arthur (1926 — 2013) Glashow, Sheldon (1932 ---RRB- glass GLAST (Gamma - ray Large Area Space Telescope) Glauber, Johann Rudolf (1607 — 1670) glaucoma glauconite Glenn, John Herschel, Jr. (1921 ---RRB- Glenn Research Center Glennan, T (homas) Keith (1905 — 1995) glenoid cavity glia glial cell glider Gliese 229B Gliese 581 Gliese 67 (HD 10307, HIP 7918) Gliese 710 (HD 168442, HIP 89825) Gliese 86 Gliese 876 Gliese Catalogue glioma glissette glitch Global Astrometric Interferometer for Astrophysics (GAIA) Global Oscillation Network Group (GONG) Globalstar globe Globigerina globular cluster globular proteins globule globulin globus pallidus GLOMR (Global Low Orbiting Message Relay) GLONASS (Global Navigation Satellite System) glossopharyngeal nerve Gloster E. 28/39 glottis glow - worm glucagon glucocorticoid glucose glucoside gluon Glushko, Valentin Petrovitch (1908 — 1989) glutamic acid glutamine gluten gluteus maximus glycerol glycine glycogen glycol glycolysis glycoprotein glycosidic bond glycosuria glyoxysome GMS (Geosynchronous Meteorological Satellite) GMT (Greenwich Mean Time) Gnathostomata gneiss Go Go, No - go goblet cell GOCE (Gravity field and steady - state Ocean Circulation Explorer) God Goddard, Robert Hutchings (1882 — 1945) Goddard Institute for Space Studies Goddard Space Flight Center Gödel, Kurt (1906 — 1978) Gödel universe Godwin, Francis (1562 — 1633) GOES (Geostationary Operational Environmental Satellite) goethite goiter gold Gold, Thomas (1920 — 2004) Goldbach conjecture golden ratio (phi) Goldin, Daniel Saul (1940 ---RRB- gold - leaf electroscope Goldstone Tracking Facility Golgi, Camillo (1844 — 1926) Golgi apparatus Golomb, Solomon W. (1932 — 2016) golygon GOMS (Geostationary Operational Meteorological Satellite) gonad gonadotrophin - releasing hormone gonadotrophins Gondwanaland Gonets goniatite goniometer gonorrhea Goodricke, John (1764 — 1786) googol Gordian Knot Gordon, Richard Francis, Jr. (1929 — 2017) Gore, John Ellard (1845 — 1910) gorge gorilla Gorizont Gott loop Goudsmit, Samuel Abraham (1902 — 1978) Gould, Benjamin Apthorp (1824 — 1896) Gould, Stephen Jay (1941 — 2002) Gould Belt gout governor GPS (Global Positioning System) Graaf, Regnier de (1641 — 1673) Graafian follicle GRAB graben GRACE (Gravity Recovery and Climate Experiment) graceful graph gradient Graham, Ronald (1935 ---RRB- Graham, Thomas (1805 — 1869) Graham's law of diffusion Graham's number GRAIL (Gravity Recovery and Interior Laboratory) grain (cereal) grain (unit) gram gram - atom Gramme, Zénobe Théophile (1826 — 1901) gramophone Gram's stain Gran Telescopio Canarias (GTC) Granat Grand Tour grand unified theory (GUT) Grandfather Paradox Granit, Ragnar Arthur (1900 — 1991) granite granulation granule granulocyte graph graph theory graphene graphite GRAPHS AND GRAPH THEORY graptolite grass grassland gravel graveyard orbit gravimeter gravimetric analysis Gravitational Biology Facility gravitational collapse gravitational constant (G) gravitational instability gravitational lens gravitational life gravitational lock gravitational microlensing GRAVITATIONAL PHYSICS gravitational slingshot effect gravitational waves graviton gravity gravity gradient gravity gradient stabilization Gravity Probe A Gravity Probe B gravity - assist gray (Gy) gray goo gray matter grazing - incidence telescope Great Annihilator Great Attractor great circle Great Comets Great Hercules Cluster (M13, NGC 6205) Great Monad Great Observatories Great Red Spot Great Rift (in Milky Way) Great Rift Valley Great Square of Pegasus Great Wall greater omentum greatest elongation Green, George (1793 — 1841) Green, Nathaniel E. Green, Thomas Hill (1836 — 1882) green algae Green Bank Green Bank conference (1961) Green Bank Telescope green flash greenhouse effect greenhouse gases Green's theorem Greg, Percy (1836 — 1889) Gregorian calendar Grelling's paradox Griffith, George (1857 — 1906) Griffith Observatory Grignard, François Auguste Victor (1871 — 1935) Grignard reagent grike Grimaldi, Francesco Maria (1618 — 1663) Grissom, Virgil (1926 — 1967) grit gritstone Groom Lake Groombridge 34 Groombridge Catalogue gross ground, electrical ground state ground - track group group theory GROUPS AND GROUP THEORY growing season growth growth hormone growth hormone - releasing hormone growth plate Grudge, Project Gruithuisen, Franz von Paula (1774 — 1852) Grus (constellation) Grus Quartet (NGC 7552, NGC 7582, NGC 7590, and NGC 7599) GSLV (Geosynchronous Satellite Launch Vehicle) g - suit G - type asteroid Guericke, Otto von (1602 — 1686) guanine Guiana Space Centre guidance, inertial Guide Star Catalog (GSC) guided missile guided missiles, postwar development Guillaume, Charles Édouard (1861 — 1938) Gulf Stream (ocean current) Gulfstream (jet plane) Gullstrand, Allvar (1862 — 1930) gum Gum Nebula gun metal gunpowder Gurwin Gusev Crater gut Gutenberg, Johann (c. 1400 — 1468) Guy, Richard Kenneth (1916 ---RRB- guyot Guzman Prize gymnosperm gynecology gynoecium gypsum gyrocompass gyrofrequency gyropilot gyroscope gyrostabilizer Gyulbudagian's Nebula (HH215)

Second, I don't see the ethical issue of forming gametes from adult stem cells being much different from sperm / egg donation for IVF.

\ n \ n «Second, I don't see the ethical issue of forming gametes from adult stem cells being much different from sperm / egg donation for IVF.

Correct DNA methylation patterns are paramount for the generation of functional gametes capable of forming viable offspring, but also for the regulation of pluripotency states and the maintenance of genome architecture and expression in somatic cells.

The problem with this process is that the gamete donors are not always completely aware of all the possible uses, or dispositions, for the embryos, which are numerous and include hESC research, donation to other patients, or destruction.

The problem with requiring the gamete donors to give informed consent for all possible dispositions is that the informed consent process itself has numerous built - in requirements including the provision that the gamete donor incur no loss of benefits if they do not give consent.

The current findings could provide important clues to determine the culture conditions for promoting the differentiation of primate ES cells into mature gametes, and to understand molecular mechanisms of primate gametogenesis including the timing of germ cell induction, the regulation of germ cell gene expression, and the response to growth factors for germ cell differentiation.

Nonetheless, derived gametes will be very useful in research, because it might be possible to produce a virtually unlimited number of eggs for experiments.

Furthermore, the requirement of mouse Boule for male reproduction and its dispensability for female fertility suggests that low level expression of Boule in embryonic germ cells and adult ovaries is not essential for either the development of germ cells or the production of female gametes.

Sex - specific traits that lead to the production of dimorphic gametes, sperm in males and eggs in females, are fundamental for sexual reproduction and accordingly widespread among animals.

Crossovers are essential for segregating the correct number of chromosomes into each gamete.

Besides ensuring correct chromosome segregation during the first meiotic division, crossovers create new allele combinations in gametes, thereby increasing genomic diversity, increasing the chance of creating offsprings with better phenotypic fitness, and providing the basis for faster evolution.

My favorite is sperm competition theory, which basically states human mate competition is not performed at the organism level (human males fighting with other human males for a human female) but actually at the gamete level (sperm fighting with other sperm for an egg).

Activity includes: • original cells in Prometaphase I showing bivalents and chiasma • cells in Prophase I showing chromosome line up during independent assortment • resulting gametes • (includes also - for an easier activity - cells in Interphase II showing cells after first round of division) Students to find matching cards (Prometaphase I, Prophase I and 4 resulting gametes) Aim: to get a greater appreciation of the variety in gametes created through crossing over and independent assortment during meiosis Print, laminate, chop up all cards, mix them up, go!

Dr. Ted Clark, «Structure Function Studies Link Viral and Gamete Fusion Proteins: Implications for the Orign of Eurkaryotic Sex».

Choose only one in each vertical column, for each genome (in a sex cell or gamete).

Many studies have demonstrated the risks that ocean acidification pose to marine organisms, such as coral dissolving in more acidic water.6 However, new findings suggest that the August and September time period could be particularly challenging for the earliest life stage of elkhorn coral — an important reef - forming coral of the Caribbean — if we continue on a path of high carbon dioxide emissions.5 Ordinarily each August or September elkhorn corals flood the water with eggs and sperm (gametes) for sexual reproduction.2

The provider can state the maximum storage period, up to 10 years, although this can be extended up to a maximum of 55 years by the Human Fertilisation and Embryology Authority (HFEA) if the requirements set out in the Human Fertilisation and Embryology (Statutory Storage Period for Embryos and Gametes) Regulations 2009 (SI 2009/1582) are met.

The central problem for Mrs Warren was that the 2009 regulations only allowed the HFEA to authorise an extended period of storage if the requirements in reg 7 (3) were met: «(a) the person who provided the gamete in question has consented in writing, whether before or after the coming into force of these regulations, to the gamete being stored for a period in excess of 10 years for the provision of treatment services; and (b) on any day within the relevant period but after the coming into force of these regulations, a registered medical practitioner has given a written opinion that the gamete provider... is prematurely infertile or is likely to become prematurely infertile.»

While Canadian law on the use and manipulation of gametes and embryos is quite conservative, those seeking less bureaucratic or more radical interventions can simply ask the potential surrogate mother to cross the Canada-U.S. border where IVF would be performed following, for example, sex selection or pre-implantation genetic testing in a more technology - friendly American state.

The outcomes (no to a reduction in the 24 - week limit for «social abortions»; yes to animal - human hybrid embryos; yes to «true hybrids» created by fusion of an animal gamete and a human gamete; yes to saviour siblings; and no to a requirement to consider the need for a father when considering IVF) have been headline news.

Twenty years ago, when Canadians were first debating how best to address potential conflicts over frozen embryos, the government - appointed Royal Commission on New Reproductive Technologies recommended that gamete providers be jointly required to make decisions regarding the disposition of their embryos prior to gametes being retrieved or embryos created, and to indicate their preferences in consent forms that would be binding for the clinic involved.

Assistant Manager — The Limited Inc. / Express Division, Cincinnati, OH Gamete Technologist — Center for Reproductive Studies / The Christ Hospital, Cincinnati, OH