| 单词 | parthenogenetic |
| 例句 | Although Michelangelo would have been the last to tell us — he liked to present himself as a parthenogenetic wonder — he did have some art training. Michelangelo Is the Divine Star of the Must-See Show of the Season 2017-11-09T05:00:00Z Although the parthenogenetic flies received genes only from their mothers, they weren’t always clones of their parent. ‘Virgin Birth’ Engineered into Female Animals for First Time 2023-08-01T04:00:00Z In a separate study published in 2021, researchers stated that it's "ecologically advantageous in the short term, but the young age and rarity of parthenogenetic species indicate it is less advantageous in the long term." Why a crocodile’s ‘virgin birth’ isn’t a miracle 2023-06-10T04:00:00Z The only previous trial using ES cells to treat Parkinson’s began last year in Australia; participants there received stem cells from parthenogenetic embryos — unfertilized eggs that are triggered in the lab to start embryonic development. Trials of embryonic stem cells to launch in China 2017-05-30T04:00:00Z As a result, they're among the most studied parthenogenetic species; their evolutionary success has essentially turned them into the poster child for unisexuality. The Verge Review of Animals: the all-female whiptail lizard 2015-07-19T04:00:00Z The adelgid is native to China and Japan and is parthenogenetic, which means all individuals are female and offspring develop from unfertilized eggs. Biological predators attacking invasive species in Conn. 2015-07-18T04:00:00Z Its parthenogenetic stem cells are in pre-clinical development for treating severe diseases of the eye, the nervous system and the liver. EU's top court opens door to some stem cell patents 2014-12-18T05:00:00Z “He could have made a career studying parthenogenetic activation,” says Schöler. Cloning comeback 2014-01-22T18:20:28.773Z Several Ambystoma species are unisexual – that is, they consist only of parthenogenetic females. Life and times of the wild Axolotl 2012-12-31T01:15:03.023Z Here’s a glimpse at some of the world’s most recently discovered parthenogenetic species: Living in the deserts of the U.S. Slideshow: Virgin Birth Not So Miraculous in Animal Kingdom 2012-12-27T14:51:40Z It appears that in parthenogenetic eggs two polar nuclei are formed. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z A parthenogenetic ovum gives off one polar body—though without reduction in the number of chromosomes—and then proceeds by asexual multiplication or ordinary cell division to build up a body. Herbert Spencer 2012-02-29T03:00:20.773Z In parthenogenetic animals both male and female individuals appear at definite times from eggs produced without sexual commerce. The Biological Problem of To-day Preformation Or Epigenesis? The Basis of a Theory of Organic Development 2011-08-29T02:01:04.170Z In certain cases single cells develop parthenogenetically, without fusion, each cell producing, however, only four spores. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z Among the vertebrata parthenogenetic development has also been observed, though rarely reaching maturity. Degeneracy Its Causes, Signs and Results 2011-05-02T02:00:17.657Z In some Insecta and Crustacea exceptional parthenogenesis occurs: a certain proportion of the eggs laid are capable of undergoing either the whole or a part of development parthenogenetically, e.g. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z A parthenogenetic population is, by definition, all female and the result, give or take the odd mutation, is that a rotifer’s daughters are genetically identical to her. Extending lifespan: Thanks, Mum! 2010-09-30T10:54:00Z These, like the parent form of spring, reproduce parthenogenetically, giving rise to generation after generation of egg-laying individuals. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" Why must those loathsome and parthenogenetic green flies devour the tender roses? The New Gulliver and Other Stories As a rule the parthenogenetic offspring are themselves incapable of further procreating their kind. Degeneracy Its Causes, Signs and Results 2011-05-02T02:00:17.657Z For Parthenogenesis. instance, it has been said that parthenogenetic ova form only one polar body. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z He is reputed to have been one of twins, children of the Sun and a maid by parthenogenetic conception. Archeological Expedition to Arizona in 1895 Seventeenth Annual Report of the Bureau of American Ethnology to the Secretary of the Smithsonian Institution, 1895-1896, Government Printing Office, Washington, 1898, pages 519-744 Heterogamy: applied to those cases in which two sexual or a sexual and parthenogenetic generation alternate. Explanation of Terms Used in Entomology The most remarkable and the most instructive of the different parthenogenetic phenomena are furnished by those cases in which the same germ-cells, according as they are fructified or not, produce different kinds of individuals. The Story of Atlantis and the Lost Lemuria According to growth rings on trees, last spring was the driest in the Beta Piedmont in centuries, so most of them survived, and as they’re parthenogenetic females, they all laid eggs. Little Fuzzy In the parthenogenetic ova of certain insects, e.g. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z If that is so, this is the only account in Passamaquoddy lore in which his parthenogenetic origin is traced. Contribution to Passamaquoddy Folk-Lore After the fourth moult, the young aphides attain maturity; and then they give origin, parthenogenetically, to a second brood, also of imperfect females, all produced without any fathers. Falling in Love With Other Essays on More Exact Branches of Science Virgin reproduction recurs regularly, parthenogenetic broods being succeeded by a single sexual brood. The Life-Story of Insects The offspring of a double individual, originated in this way, increase for some time parthenogenetically by simple fission without conjugation, until at length a second conjugation takes place among them. Scientific American Supplement, No. 810, July 11, 1891 Poulton suggests one, in the fact that parthenogenetic reproduction only occurs in isolated species, not in groups of related species; as this shows that parthenogenesis cannot lead to the evolution of new forms. Darwinism (1889) Terry had insisted that if they were parthenogenetic they'd be as alike as so many ants or aphids; he urged their visible differences as proof that there must be men—somewhere. Herland "And that the germ plasm is different from the parthenogenetic egg?" The Lost World The parthenogenetic ovum of the bee is male, and yet it is an ovum capable only of producing spermatozoa. Hormones and Heredity The parthenogenetic birth of Christ, simple enough at first as a popular miracle, was not left so simple by the theologians. Bernard Shaw's Preface to Androcles and the Lion With most of the lower animals and even with mammals, the ova show a trace of parthenogenetic power, for without being fertilised they pass through the first stages of segmentation. The Variation of Animals and Plants under Domestication — Volume 2 When I reflected on queen bees producing only males when not impregnated, whilst some other parthenogenetic insects produced, as far as known, only females, the subject seemed to me hopelessly obscure. More Letters of Charles Darwin — Volume 2 In many insects and other Arthropods which are not parthenogenetic the male has been found to possess fewer chromosomes than the female. Hormones and Heredity |
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