DiscriminationDiscrimination is the act of making unfair or prejudicial distinctions between people based on the groups, classes, or other categories to which they belong or are perceived to belong, such as race, gender, age, religion, or sexual orientation. Discrimination especially occurs when individuals or groups are unfairly treated in a way which is worse than other people are treated, on the basis of their actual or perceived membership in certain groups or social categories.
Missense mutationIn genetics, a missense mutation is a point mutation in which a single nucleotide change results in a codon that codes for a different amino acid. It is a type of nonsynonymous substitution. Missense mutation refers to a change in one amino acid in a protein, arising from a point mutation in a single nucleotide. Missense mutation is a type of nonsynonymous substitution in a DNA sequence.
Cancer screeningCancer screening aims to detect cancer before symptoms appear. This may involve blood tests, urine tests, DNA tests, other tests, or medical imaging. The benefits of screening in terms of cancer prevention, early detection and subsequent treatment must be weighed against any harms. Universal screening, also known as mass screening or population screening, involves screening everyone, usually within a specific age group. Selective screening identifies people who are known to be at higher risk of developing cancer, such as people with a family history of cancer.
MutationismMutationism is one of several alternatives to evolution by natural selection that have existed both before and after the publication of Charles Darwin's 1859 book On the Origin of Species. In the theory, mutation was the source of novelty, creating new forms and new species, potentially instantaneously, in sudden jumps. This was envisaged as driving evolution, which was thought to be limited by the supply of mutations. Before Darwin, biologists commonly believed in saltationism, the possibility of large evolutionary jumps, including immediate speciation.
Genetic distanceGenetic distance is a measure of the genetic divergence between species or between populations within a species, whether the distance measures time from common ancestor or degree of differentiation. Populations with many similar alleles have small genetic distances. This indicates that they are closely related and have a recent common ancestor. Genetic distance is useful for reconstructing the history of populations, such as the multiple human expansions out of Africa. It is also used for understanding the origin of biodiversity.
Tunisian ArabicTunisian Arabic, or simply Tunisian, is a set of dialects of Maghrebi Arabic spoken in Tunisia. It is known among its over 11 million speakers as Tounsi ˈtunsi, "Tunisian" or Derja "Everyday Language" to distinguish it from Modern Standard Arabic, the official language of Tunisia. Tunisian Arabic is mostly similar to eastern Algerian Arabic and western Libyan Arabic. As part of a dialect continuum, Tunisian merges into Algerian Arabic and Libyan Arabic at the borders of the country.
Discrimination based on skin colorDiscrimination based on skin color, also known as colourism, or shadeism, is a form of prejudice and discrimination in which people of certain ethnic groups or people who are perceived as belonging to a darker skinned race are treated differently based on their darker skin color. Although less historically significant, prejudice can also be applied towards lighter-skinned people, which is known as reverse colourism.
Tunisian RevolutionThe Tunisian Revolution (also called the Jasmine Revolution and Tunisian Revolution of Dignity) was an intensive 28-day campaign of civil resistance. It included a series of street demonstrations which took place in Tunisia, and led to the ousting of longtime president Zine El Abidine Ben Ali in January 2011. It eventually led to a thorough democratization of the country and to free and democratic elections, which had led to people believing it was the only successful movement in the Arab Spring.
RetinaThe retina (from rete "net"; : retinae or retinas) is the innermost, light-sensitive layer of tissue of the eye of most vertebrates and some molluscs. The optics of the eye create a focused two-dimensional image of the visual world on the retina, which then processes that image within the retina and sends nerve impulses along the optic nerve to the visual cortex to create visual perception. The retina serves a function which is in many ways analogous to that of the film or in a camera.
Employment discriminationEmployment discrimination is a form of illegal discrimination in the workplace based on legally protected characteristics. In the U.S., federal anti-discrimination law prohibits discrimination by employers against employees based on age, race, gender, sex (including pregnancy, sexual orientation, and gender identity), religion, national origin, and physical or mental disability. State and local laws often protect additional characteristics such as marital status, veteran status and caregiver/familial status.
