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Retinoschisis is an eye disease characterized by the abnormal splitting of the retina's neurosensory layers, usually in the outer plexiform layer.Retinoschisis can be divided into degenerative forms which are very common and almost exclusively involve the peripheral retina and hereditary forms which are rare and involve the central retina and sometimes the peripheral retina.
Retinal vasculopathy with cerebral leukocencephalopathy and systemic manifestations (RVCL or RVCL-S, also previously known as retinal vasculopathy with cerebral leukodystrophy, RVCL; or cerebroretinal vasculopathy, CRV; or hereditary vascular retinopathy, HVR; or hereditary endotheliopathy, retinopathy, nephropathy, and stroke, HERNS) is an inherited condition resulting from a frameshift ...
Genetic mutations are rare causes of certain retinopathies and are usually X-linked including NDP family of genes causing Norrie disease, FEVR, and Coats disease among others. There is emerging evidence that there may be a genetic predisposition in patients who develop retinopathy of prematurity and diabetic retinopathy.
Retinitis pigmentosa (RP) is a member of a group of genetic disorders called inherited retinal dystrophy (IRD) that cause loss of vision. [1] Symptoms include trouble seeing at night and decreasing peripheral vision (side and upper or lower visual field). [1]
Hereditarianism is sometimes used as a synonym for biological or genetic determinism, though some scholars distinguish the two terms. When distinguished, biological determinism is used to mean that heredity is the only factor. Supporters of hereditarianism reject this sense of biological determinism for most cases.
Goddard believed that a variety of mental traits were hereditary and that society should limit reproduction by people possessing these traits. The name Kallikak is a pseudonym used as a family name throughout the book. Goddard coined the name from the Greek words καλός (kalos) meaning good and κακός (kakos) meaning bad. [2]
However, there is more genetic diversity in Africa than the rest of the world combined, [82] so speaking of a "Black" race is without a precise genetic meaning. [ 81 ] Qualitative research has fostered arguments that behavioural genetics is an ungovernable field without scientific norms or consensus , which fosters controversy .
This does not mean that they are unfriendly or antisocial; rather, they are aloof and reserved in social situations. [ 89 ] Generally, people are a combination of extraversion and introversion, with personality psychologist Hans Eysenck suggesting a model by which differences in their brains produce these traits.