Articles tagged with Population Genetics
Researchers at UCLA have pinpointed a specific region on chromosome 17 associated with autism in males. The discovery may help explain why girls are less likely to develop the condition, as the gene contributing to autism only affects boys.
Research using mitochondrial DNA identified two distinct populations in Algeria and Morocco as founders of the Gibraltar macaque population. The study found that the Gibraltar macaques retained a surprisingly high level of genetic variability despite long-term isolation.
A study of French Canadian families found a strong genetic link to restless legs syndrome on chromosome 12q, with periodic leg movements during sleep being a key distinguishing feature. The findings support the involvement of multiple genetic loci in the common sleep disorder.
A new tiger subspecies has been identified through a genetic analysis of over 130 tigers, suggesting six living subspecies rather than the traditional five. The study provides valuable data for conservation strategies and captive breeding programs to combat the decline of wild tiger populations.
A new species of coral-dwelling goby was found in Papua New Guinea and is closely related to another goby species. Genetic analysis reveals that the two species diverged from each other around 200,000 years ago due to host shift, suggesting sympatric speciation by host shift as a plausible explanation.
Researchers discover a ring species of greenish warblers with gradually changing behavioral and genetic characteristics encircling the Tibetan Plateau. The study reveals how small evolutionary changes can lead to reproductive isolation between species.
The Antioquian population in Colombia exhibits a high degree of European genetic influence, predominantly from southern Spain. This is reflected in the Y chromosome data, which show that 94% of males are of European descent.
The number of centenarians in the US is growing rapidly, with projections suggesting a doubling trend. The population is expected to become more diverse, with significant increases in Hispanic and Asian populations.
The Isle Royale wolf population has rebounded dramatically after years of decline, with 25 wolves counted this winter. High reproductive success by two packs and the availability of easy prey due to poor moose conditions contributed to the increase.
Researchers calculate that populations are going extinct at a rate three to eight times faster than species loss, with significant implications for ecosystem services and human dependence on nature. The study reveals the often-overlooked benefits of individual populations, including genetic material and crop production.
Research by Dr. Roger Rosenberg and colleagues found that people with one-fourth Cherokee or less ancestry had a lower risk of developing Alzheimer's disease, suggesting a potential protective genetic effect. The study suggests that ancestry may play a role in delaying the development of the disease after age 65.