Tag: "sister" at biology news
The penalty of having a sister -- why sibling sex matters for male saiga antelopes
Having a twin sister
could put male saiga antelopes at a reproductive d...shed today. The study shows that male twins with a sister
are born lighter than those with a brother, making them smaller than the optimal size for males. The...
Uncovering DNA's 'sweet' secret
... Just how nature arrived at this molecule and its sister
molecule, RNA,remains one of the greatest - and potentially unsolvable - scientific mysteries. But Vanderbilt biochemist Martin Egli, Ph.D., isn't content to simplystudy these molecules as they are. He wants to know why they are the way they are. ...
Two central mysteries in genome inheritance solved at UCSD
...ted chromosome is comprised of a pair of identical sister
chromatids, generated by the copying of the parental DNA strand. These pairs are held together during the early stages of cell division. Once all chromosomes properly connect to the spindle, the pairs are separated and sisters are pulled towards op...
Wolves are suffering less from inbreeding than expected
...ed. It varies between 0 and 100%. If a brother and sister
are mating, their offspring will have an inbreeding coefficient of 25%. This is about the average level for the present wolf population in Scandinavia. And our analyses have shown that inbreeding is negative, inbred wolves produce less number of pups...
What controls stickiness of 'smart' chromosomal glue
...ness" is essential for the accurate segregation of sister
chromatids into separate cells. "The key questio...hromosome pair has replicated to produce identical sister
chromotids in the initial stage of meiosis, the chromosomes exchange arm segments. Only after this e...
Virginia Bioinformatics Institutes launches microbial database
... oak trees in California and Oregon; P. sojae, the sister
pathogen of P. ramorum, causes serious damage to soybean crops. Tyler and collaborators, in conjunction with the U.S. Department of Energy (DOE) Joint Genome Institute (JGI), successfully completed the genome sequences of the pathogens in 2004. The ...
Some good news for the world's poor
...r's lead author, Dr. Shenggen Fan, works at IRRI's sister
institute, the Washington-based International Food Policy Research Institute (IFPRI). In his paper, Dr. Fan said: "The results indicate that rice varietal improvement research has contributed tremendously to increases in rice production, accounting f...
DNA traces evolution of extinct sabertooths and the American cheetah-like cat
...The analysis shows that the sabertooth cats were a sister
group to the modern cats--that is, they diverged early on from the ancestors of modern cats and are not closely related to any living felid species. The phylogenetic tree drawn from the new data also shows that the American cheetah-like cat is genet...
UCR biochemist goes to Washington with high-protein corn
...r of flowers for every kernel. But then one of the sister
flowers undergoes abortion, resulting in one flower for each kernel. Gallie's research group has developed technology that essentially rescues the aborted flower, resulting in two kernels that are fused together. "Despite the fusion, the kernels are ...
Envisat and ERS-2 reveal hidden side of Hurricane Rita
...e day Envisat acquired its ASAR image of Rita, its sister
spacecraft ERS-2 also made complementary observations of the hurricane's underlying wind fields using its radar scatterometer. This instrument works by firing a trio of high-frequency radar beams down to the ocean, then analysing the pattern of bac...
Fungus-farming termites descend from an African rain forest Eve
...n this habitat than each of their non-agricultural sister
groups, which thrive in the rain forest. Interestingly, those results have some parallels to the origin and subsequent evolution of human agriculture. Human agriculture is also believed to have originated in relatively favourable areas to which most...
Needling Chromosomes Reveals Cell Division Secret
...together, they attachindependently, and often both sister
chromatids can go to the same polerather than to o...s."According to Nicklas, it was known that the two sister
chromatidsadhered to one another and released at the appropriate time during celldivision. However, ...
Deficient DNA Repair Capacity Associated With Increased Risk Of Breast Cancer
...d samples taken from pairs of sisters in which one sister
had been diagnosed with breast cancer and the other had not. They found that DNA repair capacity was lower in breast cancer patients than in the control subjects. Deficient DNA repair capacity was associated with a twofold increase in the risk of br...