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Tag: "parental" at biology news

Glow-in-the-dark zebrafish at UH hold keys to biological clocks

...etic makeup that gets their clocks ticking without parental influence, however, we determined that it does take some sort of environmental input for the clock to start. In this case it was exposure to light/dark cycles after the fourth day of development, about the age when the fish start to swim and feed." ...

The biggest family tree ever

...ecipher the characteristic genetic markers of both parental lineages. UA is collaborating in a joint venture with Family Tree DNA, a company specializing in tracing ancestry using genetics. The company has been contracted to process the samples in the Genographic Project. Hammer is a consultant for and holds...

Where bacteria get their genes

...mes represent a mix of genetic material from their parental cells and from other species of bacteria. Ochman and his colleagues' work shows that bacterial lineages can still be traced by considering only the "traditional" forms of genetic inheritance. The widespread exchange of genes does not blur the line o...

Bugs, even 'bad' ones, can be educationally beneficial, new book says

...pter titled "Guaranteeing descendants: The role of parental care." Waldbauer emphasizes that insects can be useful to humans. For example, he said, maggot therapy has been used to remove gangrenous tissue while leaving healthy tissue intact. Because of the increasing prevalence of bacterial resistance, the t...

Where Bacteria Get Their Genes

...mes represent a mix of genetic material from their parental cells and from other species of bacteria. Ochman and his colleagues' work shows that bacterial lineages can still be traced by considering only the "traditional" forms of genetic inheritance. The widespread exchange of genes does not blur the line o...

Boosting The BCG Vaccine To Beat Tuberculosis

...against tuberculosis significantly better than the parental BCG. Superior protection is not only induced against the laboratory strain of M. tuberculosis but also against a clinical isolate of the Beijing/W family, a straing of tuberculosis that is spreading all over the world, is drug-resistant, and is respo...

Researchers Discover Ancient Origins Of Tuberculosis-causing Bacteria

...against tuberculosis significantly better than the parental BCG. Superior protection is not only induced against the laboratory strain of M. tuberculosis but also against a clinical isolate of the Beijing/W family, a straing of tuberculosis that is spreading all over the world, is drug-resistant, and is respo...

Agilent Technologies Introduces First Commercial Mouse Microarray for Comparative Genomic Hybridization Research

...against tuberculosis significantly better than the parental BCG. Superior protection is not only induced against the laboratory strain of M. tuberculosis but also against a clinical isolate of the Beijing/W family, a straing of tuberculosis that is spreading all over the world, is drug-resistant, and is respo...

Environment, not genes, key in family relationships

...egativity (parent-child coercion and conflict) and parental monitoring and control. All variables were measured from multiple perspectives: the adolescent's, the mother's, the father's, and in some cases, observers' ratings of videotaped family interactions. Because the data the researchers were using came ...

Divergent mating systems and parental conflict as a barrier to hybridization in flowering plants

...uce a new individual. From the former perspective, parental interests are unified (both wish to produce vigoro...ist argues that with increased self-fertilization, parental conflict decreases. Consequently, parents from frequently selfing groups should be competitively inf...

Same-sex mating by fungi spawned infection outbreak, evidence suggests

...pothesis that the minor type represents one of two parental strains that gave rise to the major outbreak isolate," said study author James Fraser, Ph.D., also of Duke. "The second parent strain remains to be discovered." Additional examination of the mating type locus provided evidence that the major outbrea...

New hybrid virus provides targeted molecular imaging of cancer

...hybrid retained the properties of their respective parental viruses, which the researchers called a surprising outcome. "This is only a proof-of-concept, and although we have yet to translate these hybrid viruses for use in humans, we hope that this new system will have future clinical applications," says Wa...

African amphibians make extreme parental sacrifice: The skin off their backs

...weeks, Nussbaum said. "This form of post-hatching parental care, in which the mother provides nutrition to he...at. Amphibians are a diverse lot when it comes to parental care, which may include hiding, guarding, carrying and feeding offspring. Among caecilians---the ord...

Sex chromosome genes influence aggression andmaternal behavior, say UVa researchers

...so clocked the time it took to exhibit spontaneous parental behavior by retrieving a pup. The researchers fou... discovery of new genetic bases for aggression and parental behavior in other animals, including humans." ...

A protein complex that untangles DNA

...s will contain the same genetic information as the parental cells, any damage to the DNA, which is organised into several chromosomes, must be repaired. "A cancer cell often has chromosomal aberrations that can be linked to erroneous copying, separation, or repair of the DNA molecule. By learning about the ...

Zebra finch males prefer females with exaggerated maternal traits

...give birds a preference for mates with exaggerated parental traits, rather than traits that more exactly match those of their parents. Such learned mate preferences may help drive the evolution of exaggerated traits and strong morphological differences between sexes ?phenomena seen frequently in birds and oth...

Researchers find protein that silences genes

...he phenomenon of nucleolar dominance, in which one parental set of ribosomal genes in a hybrid is silenced, Cr...one deacetylation, indicating that turning off one parental set of ribosomal genes was really the secret to nucleolar dominance. In other words, all the facto...

Newborn screening can cause unnecessary parental stress

...ort that false-positive results cause considerable parental stress, even when the baby proves negative on rete...oup. Fifteen percent said their child needed extra parental care, versus 3 percent of mothers in the comparison group. After adjustment for socioeconomic factor...

Embryo tests give parents the choice

...inics are performing sex selection just to satisfy parental preferences, and embryo screening is being used for late-onset diseases that have nothing to do with childhood sickness," Cohen claims. He sees these as troubling trends. The changes are taking place because there is little consensus on which tests ...

Striking the right balance between excitation and inhibition

... or inhibitory, the researchers asked how a single parental progenitor cell could produce both excitatory and inhibitory daughter cells, and how approximately equal numbers of each daughter cell are produced. In a study published in the June edition of Nature Neuroscience (now available online), the team fo...

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