Nevada researcher re-ignites mammal reproduction debate
...ghters of less healthy mothers would out-reproduce sons in poorer conditions because males that are unsuccessful in having mates have few offspring while most females breed throughout their lifetime." The problem with this idea is that, until now, only about 30-percent of studies have supported the hypot...Parting genomes: UA biologists discover seeds of speciation
...h D. mojavensis males, all of the resulting hybrid sons are sterile. This partial capacity for interbreedi...n California coast, mothers always produce sterile sons when crossed to D. arizonae males. Because the hybrid male sterility trait depends on the mother's g...Young chimpanzees show sex differences in learning
...ther male or female offspring to observe them, yet sons and daughters did different things. And it makes perfect sense for chimps. "The availability of animal protein is limited for chimpanzees. They can fish for termites or hunt colobus monkeys," explained Lonsdorf. "Mature males often hunt monkeys up in...'Ageing gene' could be passed on via X chromosome
...ers, and among siblings, but not among fathers and sons or between spouses. In other words, the inheritance of a parental X chromosome (from mothers for sons, and from both parents for daughters) was strongly correlated with similar telomere length between parents and children. Dr Staessen comments: "X-li...Honeybee gene find ends 150-year search
...mon with each other than they would with their own sons and daughters. But this also has a downside for bee breeders. When bees are inbred to select desired traits, fertilized eggs with two copies of the same csd allele can occur. These eggs develop into sterile diploid males. Worker bees find and kill th...No detectable risk from mercury in seafood, study shows
...s were slightly less likely to be hyperactive, and sons of such women did slightly worse on a pegboard task. Statistically, both findings are likely due to chance, the researchers say. The Seychelles findings apply to fish bought and sold commercially, at grocery stores, supermarkets, seafood markets, an...Research to estimate pesticides' effects on children
...esticide exposure among children -- especially the sons and daughters of California farmworkers. The grant is a direct result of the 1996 Food Quality Protection Act, which required the EPA to re-evaluate the health effects of commercial and household pesticides on children. Of particular concern to EPA ...Osteoarthritis and genetic link
...ffspring, including both fathers and mothers, both sons and daughters. The average age was 62 for the parents and 54 for the children. Fifty percent of the original participants and 30% of their offspring had at least one hand joint affected by OA. Using the established Kellgren/Lawrence grading schem...Researchers discover gene causing deadly infantile form of genetic kidney disease
...er kidneys to Austin to save her now five-year old sons life. Austin has shown us how to meet these battles and fight this disease, and now we look forward to treatments and a cure. Knowing the gene defect will result in a better understanding of the disease, leading eventually to effective therapies, ad...Age at first drink: What does it really mean?
... for disinhibitory behaviors. They found that the sons (but not the daughters) of parents with an early AFD were themselves at increased risk for conduct and oppositional defiant disorder. They also found that early use of alcohol is familial and, at least among males, can be inherited. "It is well esta......d her normal X makes up for the defective one. Her sons have a 50 percent chance of inheriting the defecti...ect underlying low sperm count can be inherited by sons from their fathers when infertile fathers use intracytoplasmic sperm injection (ICSI) to have childr...UC Berkeley psychologist finds evdence that male hormones in the womb affect sexual orientation
...s of male hormones and that, while most later-born sons are straight, the increased androgen level slightl..."that somehow the mother's body remembers how many sons she has had and exposes each successive male fetus to more androgen. "It is just mindboggling to thi......an to phylogenetic thinking," said Avise. "Just as sons and daughters `inherit' their fathers non-recombined surname [before recent rule changes in some families], so too do progeny normally receive non-recombined mtDNA from their mothers. Furthermore, much the same way that mutations sometimes arise in s...Fathers pass infertility to sons
June 30, 1999 -- Researchers have discovered that sons conceived with the aid ofa popular in vitro fert... and his colleagues studied three men who fathered sons through awidely used fertilization technique called intracytoplasmic sperm injection(ICSI). In each ...New Test Spots ALD Carriers With Near-Perfect Accuracy
...Hirschbeck and his wife. The Hirschbecks have two sons with the disease. The new techniques also should speed research in treating those withthe disorder by helping to show precisely where abnormal genes go wrong. ALDpatients have abnormally high levels of molecules called very long chain fat...COGA Suggests Genetic Loci For P3 Brain Wave Abnormality
...ntified reduced P3 wave amplitude in alcohol-naive sons of alcoholics, researchers have regarded the abnormality as a potential noninvasive marker of genetic risk for alcoholism. Event-related potentials (ERPs) are brain electrical signals produced in response to specific sensory stimuli (such as a lig...Among Wrens, Moms Teach Daughters To Call, Dads Teach Sons, Study Reveals
...ughters learning from their fathers,and why aren't sons learning from their mothers? What's important for them tolearn just from the same sex and not the other." Perhaps the behavior somehow prevents closely related birds frombreeding with one another, he said. Since males and females areindisting...Leftover Fetal Cells May Affect Development Of Scleroderma
...samples taken from these women. Women who had had sons rather thandaughters were chosen for study simply for technical reasons, because within themilieu of the mother's cells, it is easier to detect evidence of the Ychromosome than to distinguish a daughter'sDNA. The researchers tested the samples blind...... cover the sperm-making history of the father. The sons of these irradiatedfathers were allowed to mate with females beginning at eight weeks of ageto produce the grandchildren that were used in Wiley's study. In the assay developed by Wiley more than 10 years ago, embryos consistingof only four cells ar......sooner orbecause parents interact differently with sons and daughters. Girls alsoappear to be more compliant and easier to test, Professor Reznick said. While language development has been shown to be slightly delayedin some twin studies, that was not the case in the MacArthur study,Professor Rez...