Oncology & Cancer

Brain tumor study highlights differences among Hispanics

Although typically classified as a single ethnic group, people of Hispanic heritage have markedly different risks for brain tumors based on their geographic origins, suggesting greater diversity that warrants attention in ...

Medical research

What would it take to set up an African drug discovery ecosystem?

Africa has great potential for drug discovery. The continent has natural resources, indigenous knowledge and human capacity. And it has the need: it bears more than 20% of the global disease burden. There are many internationally ...

Oncology & Cancer

New research highlights racial disparities in genomic profiling

A new study by researchers at Sylvester Comprehensive Cancer Center at the University of Miami Miller School of Medicine has found that Black women with metastatic breast cancer were less likely to have tumors with treatable ...

Medications

Scorpion sting might save lives from coronavirus

The potential of scorpion venoms to combat the threat of new variants of coronavirus is being explored by scientists from the University of Aberdeen and the University of Suez Canal, Egypt.

Medical research

Mapping the effects of genetic variation, one letter at a time

In the two decades since the human genome was first sequenced, scientists have learned much about how the genome is organized and how widely it varies between people around the globe. A better view of how that genetic variation ...

Diseases, Conditions, Syndromes

Incidence estimation from SARS-CoV-2 genomes

A team of researchers from the Robert Koch Institute in Berlin and the Max Planck Institute for the Science of Human History present a novel method for the rapid estimation of incidence trajectories from serially sampled ...

Immunology

Link uncovered between genital warts and the immune system

New research presented today at the EADV 30th Congress reveals a link between genital warts and the human leukocyte antigen (HLA) system—the part of the immune system which helps regulate immune responses. The findings ...

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Genetic diversity

Genetic diversity is a level of biodiversity that refers to the total number of genetic characteristics in the genetic makeup of a species. It is distinguished from genetic variability, which describes the tendency of genetic characteristics to vary.

The academic field of population genetics includes several hypotheses and theories regarding genetic diversity. The neutral theory of evolution proposes that diversity is the result of the accumulation of neutral substitutions. Diversifying selection is the hypothesis that two subpopulations of a species live in different environments that select for different alleles at a particular locus. This may occur, for instance, if a species has a large range relative to the mobility of individuals within it. Frequency-dependent selection is the hypothesis that as alleles become more common, they become less fit. This is often invoked in host-pathogen interactions, where a high frequency of a defensive allele among the host means that it is more likely that a pathogen will spread if it is able to overcome that allele.

This text uses material from Wikipedia, licensed under CC BY-SA