Study Examines How Mechanisms Evolve To Regulate Bee Development
...ggs. But because workers don't mate, their eggs go unfertilized and theiroffspring are drones. Sons of fast workers again grew up fast, suggesting,Robinson said, that drones and workers have similar control mechanisms intheir brains, even though their functions in bee society are totally different. The work, fun...Researchers Announce Breakthrough In Transgenic Animal Technology
...le. The transgameticmethod inserts a gene into the unfertilized oocyte or egg, which stablyincorporates the gene into the maternal germline. Once the egg is fertilized,all cells of the resulting embryo carry the new gene, and the calf is born withthe capability to secrete a new protein in milk. Subsequent generat...Mom may set your body clock, suggests Science research
...'s activity rose and fell at a steady pace in both unfertilized and fertilized eggs-regardless of when fertilization took place. In fact, the researchers observed this pattern in the fertilized egg, or "zygote," before the zygote had begun expressing its own genes. (Until a certain point, the zygote relies on a...Human reproductive success tied to mitochondrial organization in eggs
...originate from cell material contained in both the unfertilized egg and the sperm, Van Blerkom said. Once the sperm enters the egg, the microtubule arrays began to form and the mitochondria began traveling along these pathways. Van Blerkom said the symmetry or asymmetry of the mitochondria-carrying microtubules ...NICHD funded researchers first to genetically modify non human primate
...successful effort to introduce a new gene into the unfertilized eggs of rhesus monkeys, a member of the family of mammals that includes human beings. The eggs were then fertilized, resulting in several pregnancies and the birth of three live monkeys. The gene was successfully incorporated into one monkey's DNA,...First genetically modified monkey, reported in Science, may promise medical advances for humans
...onkey received an extra gene while he was still an unfertilized egg, making him the world's first genetically modified non-human primate. Born on 2 October, 2000, "ANDi is robust and plays normally with his two roommates," reported Science author Gerald Schatten of the Oregon Regional Primate Research Center ...Fire ant queens and workers negotiate truce' on colony sex ratio
...come females with diploid, or paired, chromosomes; unfertilized eggs become males with haploid, or single, chromosomes. The root of the power struggle between queens and workers results from the different interests they have in raising new members of the colony. Both as a result of evolutionary pressures are in...Researchers develop primate stem cells from unfertilized embryo
...mbryonic development is initiated directly from an unfertilized egg cell. Parthenogenesis results in a microscopic ball of cells, called a blastocyst, typically 50 to 200 cells. When an egg is fertilized by sperm in the body or in vitro, it can then grow into a fetus. But the blastocyst that results from parthe...Social insects could offer clues about genetic conflict
...haploidiploidy, in which all the males result from unfertilized eggs. This results in unusual genetic patterns where different groups of siblings and cousins share more genetic links on their fathers side than their mothers, or vice versa. For example, haploidiploid sisters always share paternal genes, but they h...Leading cloning experts challenge Clonaid to prove claim
...her, the nuclear donor who apparently provided the unfertilized egg to produce the child. "It is essential that independent experts not involved in any aspect of the cloning are present at the collection of DNA samples," Wilmut said. "There must be no possibility of confusion." "These reported claims underscore ...Failures in primate cloning may signal impossibility of human reproductive cloning
...ic cloning, limited cell division is induced in an unfertilized egg cell to produce embryonic stem cells. In reproductive cloning, an egg cell with a donor nucleus is implanted into a living surrogate female in an attempt to make a successful pregnancy. "The chromosomes do not split properly," said Dr. Schatten,...First West Coast baby born using frozen egg technique
...glia said. They really had no other choice because unfertilized eggs don't survive very long. It was devastating for them. She was watching all this fall apart. They had invested a lot of money -- and emotions." Early that March afternoon they froze all the eggs they extracted. In late June Jennifer's cycle w...First West Coast baby born using frozen egg technique
...glia said. They really had no other choice because unfertilized eggs don't survive very long. It was devastating for them. She was watching all this fall apart. They had invested a lot of money -- and emotions." Early that March afternoon they froze all the eggs they extracted. In late June Jennifer's cycle w...AACR forum to discuss stem cells and cancer research: Public policy issues
...ansfer or "therapeutic cloning." Here, you take an unfertilized egg, and remove the nucleus. Then, you inject the DNA-containing nucleus from an adult cell, say a skin cell, into the egg and allow it to grow into an embryo. Once it reaches the blastocyst stage, you harvest stem cells that are identical to the adu...Scientists identify new sperm protein required for fertilization
.... The protein, called SED1, binds specifically to unfertilized eggs and no longer recognizes an egg after it has been fertilized. When examined in the laboratory, sperm without SED1 were unable to bind to an egg. Further, mice without SED1 had greatly reduced fertility even though the sperm appeared normal in ...Honeybee gene find ends 150-year search
... that male bees have no fathers: They develop from unfertilized eggs, while females grow from fertilized eggs. Later work showed that Dzierzon was right. Male bees have half as many genes (haploid) as females, which get a set of genes from each parent (diploid). About one-fifth of animal species including all ant...Profiling the genes that make stem cells
...ome (record of transcribed genes) included data on unfertilized eggs; "totipotent" fertilized eggs, which have the potential to become any cell; pluripotent embryonic cells; various embryonic and adult stem cells; and fully differentiated cells. Because they examined tissues that had not previously been includ...Male susceptibility to disease may play role in evolution of insect societies
...ch parent. Hymenopteran males, however, hatch from unfertilized eggs and are haploids with just one set of chromosomes. "Disease and infections are a very powerful and ongoing force in natural selection, and natural selection should favor individuals that possess forms of genes, or alleles, that make them more r...Therapeutic cloning may be permitted at Newcastle University
... from a skin cell to be removed and placed into an unfertilized egg. This egg is then stimulated to divide until a group of cells form. Stem cells are then isolated from this group and have the potential to grow into any cell type in the body. If directed to make insulin cells, a cure would be achieved. ...... out pioneering research to create stem cells from unfertilized human eggs. This is the first time in the UK that ... from a skin cell to be removed and placed into an unfertilized egg. This egg is then stimulated to divide until a group of cells form. Stem cells are then isolated...