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unfertilized in Medical News

Scientists Make Clones of Mice Dead 16 Years

...lems today." Scientists have cloned other species -- including celebrity sheep Dolly -- by using two live cells. Genetic material is taken from an unfertilized egg and then transferred to another live cell for "incubation," a process known as nuclear transfer. Until now, researchers had believed that ice...

BioTime, Inc. and Embryome Sciences, Inc. Launch Embryome.com and the International Embryome Initiative

...ome Sciences' proprietary "Embryomics™" technology, International Stem Cell's proprietary parthenogenetic stem cell lines derived from unfertilized human eggs, and technology and approved hES cell lines licensed by BioTime from the Wisconsin Alumni Research Foundation (WARF). Data on these cell li...

Pacific Fertility Center Announces Breakthrough in Egg Freezing Technology

...microscopist Antony von Leeuwenhoek allegedly cooled and then recovered sperm using snow and ice in the 17th century), reliable methods for preserving unfertilized eggs have been elusive until now. Traditionally, preservation of sperm and embryos has been achieved with the use of a technique called slow freezin...

Human embryonic stem cell lines created that avoid immune rejection

...and recipient, reducing the chances of provoking an immune reaction against the transplanted donor cells. Second, the stem cells are derived from unfertilized donor eggs, not from fertilized embryos, so the technique does not carry the same ethical burden. The future clinical relevance of this work will ...

Human Urine Safe, Productive Fertilizer

...ed worldwide, and it can be preserved as sauerkraut. The cabbage fertilized with urine was compared with similar plots of cabbage that either went unfertilized or where commercial fertilizer was used. At harvest, the cabbage enriched with the urine had several advantages: It was slightly larger, it grew to...

Female Ducks Develop Complicated Genitals to Outwit Aggressive Males

...ers. You get this evolutionary arms race," Brennan said. Only if the female is relaxed and cooperative can the male's sperm get anywhere near the unfertilized eggs, the researchers suggest. "What I think is really cool is this does speak a lot about the ability of the female to have these cryptic mechan...

Female Ducks Develop Complicated Genitals to Outwit Aggressive Males

...iers. You get this evolutionary arms race," Brennan said. Only if the female is relaxed and cooperative can the male's sperm get anywhere near the unfertilized eggs, the researchers suggest. "What I think is really cool is this does speak a lot about the ability of the female to have these cryptic mechani...

Magic of Motherhood Through Egg Donation

...tatus of a mother, it has recently evolved to encompass the donation of eggs for research. Somatic Cell Nuclear Transfer is a technology that uses unfertilized human eggs to produce patient-specific embryonic stem cell lines. This method is mainly employed in therapeutic stem cell research to find cures for ...

Scientists Enlist Worms to Discover New Therapies for Huntington’s Diseas

...genetic material into the worms before they are zapped by powerful radiation. At just the right level of radiation, the DNA strands in the worms' unfertilized eggs snap and the dye-tagged material slips into the chromosomes. The glowing protein is then reproduced in the worm's offspring. If the target ...

Cloning From Mice Hair Follicle Stem Cell

...mouse hair follicle stem cells. Mice can be cloned from hybrid cells which is nothing but the nucleus of an adult skin stem cell and a nucleus-removed unfertilized mouse oocyte. It was also found in this study that rate of cloning efficiency in male mice was higher than their female counterparts. These hair folli...
unfertilized in Biological News

Insects that produce males from unfertilized eggs reveal a surprising cellular feat

Scientists have long known that the social insects in the order Hymenoptera--which includes ants, bees, and wasps--have an unusual mechanism for sex determination: Unfertilized eggs develop into males, while fertilized eggs become females. But the development of an unfertilized egg into an adult (c...

Gene exchange common among sex-manipulating bacteria

.... Mechanically speaking, the bacteria convert genetic males into females or kill male embryos that are then eaten by their sisters or make females lay unfertilized eggs that all become females. However, what happens most commonly is that the males cannot reproduce with non-infected females. This gives the infecte...

Male seahorses are nature's Mr. Mom, Texas A&M researchers say

...(an external structure that grows on the body of the male) and deposits her unfertilized eggs into the pouch. The male then releases sperm into the pouch to fertili...siologically much more complex than that. After the female deposits her unfertilized eggs into the male, the outer shell of the eggs breaks down, and tissue fro...

Male seahorses are nature's Mr. Mom, Texas A&M researchers say

...(an external structure that grows on the body of the male) and deposits her unfertilized eggs into the pouch. The male then releases sperm into the pouch to fertili...siologically much more complex than that. After the female deposits her unfertilized eggs into the male, the outer shell of the eggs breaks down, and tissue fro...

Faster koa tree growth without adverse ecosystem effects

...sses did not grow more where tree thinning had occurred. Scientists even found fertilizers reduced the growth of these alien grasses when compared to unfertilized test plots. The studys findings also showed the treatments were either neutral or beneficial to forest bird habitat, an important consideration beca...

Biofuels Sustainability

...rops and retaining the other services provided by the land is far more challenging, but very much worth the effort. For example, lower yields from an unfertilized native prairie may be acceptable in light of the other benefits, such as minimized flooding, fewer pests, groundwater recharge, and improved water qua...

Will intensive forest practices impact water quality?

...ompeting vegetation. One subset of clearcut watersheds was fertilized with an aerial application of diammonium phosphate while another subset was not. unfertilized streamside buffers of at least 15 m, consistent with Texas best management practices (BMPs), were retained on all intermittent and perennial streams. ...

Scientists clone mice from adult skin stem cells

... Laboratory of Developmental Biology and Neurogenetics, headed by senior co-author Peter Mombaerts. To execute the nuclear transfer procedure, Li took unfertilized mouse oocytes and replaced the nucleus of each oocyte with a nucleus from these adult skin stem cells. A main hurdle in nuclear transfer with ad...

Cloned mice created from fully differentiated cells, a milestone in cloning research

...es creating an embryo by using a nucleus that's been removed from a somatic cell ?any cell other than a reproductive cell ?and transferring it into an unfertilized egg that has had its chromosomes removed. Because the resulting new embryo contains the entire genome of the donor somatic cell it is an identical cop...

Cracking the egg

... a mix of genes from both parents. There are many startling events along the way, but one of the most fundamental and important is the transition from unfertilized egg to fertilized embryo. Think about it: The former is and will remain an egg if left alone, while the latter has within it the means to unleash t...
unfertilized in Biological Technology

BioTime, Inc. and Embryome Sciences, Inc. Sign Agreement With International Stem Cell Corporation to Provide Unique Human Stem Cell Lines for Research Use

...tional Stem Cell's proprietary parthenogenetic stem cell lines derived from unfertilized human eggs and technology and approved hES cell lines licensed from the Wis...ogenesis, results in the creation of pluripotent human stem cell lines from unfertilized human eggs. ISCO scientists also have created the first Parthenogenetic hom...

UW-Madison scientists guide human skin cells to embryonic state

...a critical question posed by Dolly, the famous sheep cloned in 1996. Dolly was the result of the nucleus of an adult cell transferred to an oocyte, an unfertilized egg. An unknown combination of factors in the egg caused the adult cell nucleus to be reprogrammed and, when implanted in a surrogate mother, develop ...

Human cloning plans get blessing from British government

...people who have an inherited form of MND of unknown genetic cause, a Kings College release said. They will then remove the genetic information from an unfertilized egg and replace it with the nucleus of a cell from a familial MND patient. Eggs that have successfully received the nucleus containing the MND-causing...

The Attack of the Clones: No, its not a summer movie

...rom the process used in therapeutic cloning. The first step in both procedures involves removing an eggs nucleus (the part containing its DNA) from an unfertilized egg. What happens next is where the difference lies, insist those who want therapeutic cloning to remain an option for scientists in search of life...
unfertilized in Biological Definition

Ploidy

...haploid cells and the other has diploid cells. Most commonly, the male is haploid and the female is diploid. In such species, the male develops from unfertilized eggs, while the female develops from fertilized eggs: the sperm provides a second set of chromosomes when it fertilizes the egg. Haplodiploidy is fo...

Ploidy

...haploid cells and the other has diploid cells. Most commonly, the male is haploid and the female is diploid. In such species, the male develops from unfertilized eggs, while the female develops from fertilized eggs: the sperm provides a second set of chromosomes when it fertilizes the egg. Haplodiploidy is fo...
unfertilized in Biological Dictionary

Pollen tube

...es and ... The precise guidance of the pollen tube to the embryo sac is critical to the ... Pollen tubes selectively arrived at complete, unfertilized embryo sacs but did ... germinates and forms the pollen tube , which grows through the stigma, style, ... Pollen tube growth. occurs only ...

Parthenogenesis

...tion by a male. In plants, parthenogenesis means development of an embryo from an... parthenogenesis n. A form of reproduction in which an unfertilized egg develops into a new individual, occurring commonly among insects and certain Natural parthenogenesis has been observed in many lower anima...

Oocytes

...pplications of in vitro maturation for oocyte donors and for fertility preservation, ... chromosome complement of human non-inseminated and unfertilized fresh oocytes . ... These oocytes were fixed immediately after retrieval and 47 good quality ... ... in mammalian oocyte maturation ... irregul...

Mictic egg

...gg . A thin shell ed haploid egg . ... Larvae hatching out of these unfertilized mictic eggs develop into haploid males. ... Mictic eggs which wil...ifers have two types of eggs , amictic eggs and. mictic eggs . ... If unfertilized mictic eggs develop quickly and parthenogenetically into males; ... ...

Genomic clone

...st ... ... of an EST(s) or polymorphic marker(s) within a genomic clone , PCR primers, ... To map the genomic clone to chromosomal location, unfertilized eggs were used to ... CYP71A31 CG951015.1 Medicago truncatula genomic clone ... CYP71D69v2 CG964663.1 Medicago truncatula genomic clone . 98...

Gamete

...es of either of the sets of ... In most organisms the gametes are produced by a special double cell division ... But a drone develops from an unfertilized egg, which is a single gamete (ovum) ... Gamete - definition from Biology-Online.org ... Q: What is gamete intrafallopian transfer? A: Gamet...

Blastoderm

...blastoderm of Drosophila. ... 4',6'-Diamidino-2-Phenylindole Staining of the Blastoderm ... Quail blastoderm and blastodisc of fertilized and unfertilized oocytes after oviposition. A) ... ...
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