Heterochromia Iridis is the Greek term for “differently colored irises”. More popularly known as just heterochromia, as the term is described two different-colored eyes that are on the same being. Heterochromia is most commonly found in cats. Instead of calling the condition heterochromia, the term often used for cats is “odd-eyed”. Along with heterochromia, however it has been supposedly known to be linked to other disorders, such as deafness making odd-eyed cats can be more vulnerable to. While heterochromia is usually present when the disorder; deafness is found, heterochromia in cats does not stimulate hearing loss than normally would, because how the mutation develops doesn't contributed to the linked condition, the certain breeds who are more susceptible to heterochromia along with the other associated disorder, and one known condition (hearing loss) linked to cats with heterochromia.
How the mutation develops is the amount of melanin, the pigment that turns our skin darker while in the sun, which also determines the eye color in humans and cats. While all kittens are born with blue eyes, when the kitten grows the melanin transfers to the eye’s iris. If the melanin does not transfer, the eyes will remain blue. Nevertheless, if melanin only spreads to one eye, the result will be heterochromia; one blue eye and other ranging from yellow to brown (Cats with Two Different-Colored Eyes). A lack of melanin doesn’t contribute to major disorders as believed, every so often does deafness appears in cats with heterochromia. Estimating 60 to 70 percent of odd-eyed cats don’t suffer from hearing loss (Cats With Two Different-Colored Eyes).
Breeds that are more susceptible to heterochromia are typically white or mostly white cats. . Bre...
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.... Heterochromia cannot be the cause of another disorder, because it is already a product of an incident itself, which probably only prompted the other disorder to arise.
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Is acquired deafness more traumatic psychologically than developmental? Does being deaf have positive characteristics? How does being deaf affect relationships with family and
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Xeroderma Pigmentosum is a genetic disorder caused by a mutation in one of any seven genes. This genetic mutation is an autosomal recessive trait. This disease was discovered in 1874 by Hebra and Kaposi. People with this disease cannot have direct exposure to sunlight, or blisters on the skin may occur. There are only about 250 people in the world with this disease.
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This genetic disorder is not specific to a certain age, ethnic group, or gender; theref...
Albinism is a genetic condition present at birth, characterized by a small amount of melanin pigment in the skin, hair and eye. Albinism is an occasional inborn sickness related with vision difficult, which affect one in seventeen thousand persons. It is not a contagious disease and cannot be spread over contact. Albinism affects individuals from all races. Most folks with albinism have parents with a normal color of skin. Some may not even recognize that they are Albino until later on in their life. This paper will be based on the study of albinism, causes, types, the genetic transmission and some possible medical problem.
Taryn Simon was born in New York in 1975. Simon's photography consists of a triad of equal elements: photography, design, and text. Her works examine the impracticality of complete knowledge and unlocks the gap between image and text, where confusion arises, and ambiguity is strong. She archives subjects that do not “officially exist, did not happen, and cannot be seen. Others who possess this urge generally write fiction.” (Simon).
National Institute on Deafness and Other Communication Disorders. (November 2002). Retrieved October 17, 2004, from http://www.nidcd.nih.gov/health/hearing/coch.asp
Many signs include a "white pupil," also known as leukocoria. Retinoblastoma can occur in either one or two eyes (Paul T. Finger, Pg. 1). This abnormal white pupillary reflex is sometimes referred to as a cat's eye reflex. Another sign of retinoblastoma is a crossed eye (Ambramson, Ch3). Leukocoria doesn't always end up as being retinoblastoma, it can even result in: congenital cataract, Toxocara canis, Coat's disease, and persistent hypertrophic primary vitreous (PHPV) (Finger, Pg.2). Retinoblastoma occurs when there's a mutation or deletion of the q14 band of chromosome 13 (Finger, Pg. 1). Symptoms can be painful if not treated quickly. Some include a red, painful eye, swelling of the surrounding eye, poor vision, dilated pupil, even extra fingers or toes, and retardation (Ambramson, Ch3).
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middle of paper ... ... avour of "purity of the race" idea, but they understand how it worked. Blond hair and blue eyes are recessive genes. Two brown-eyed people can give birth to a blue-eyed child, but two blue-eyed people cannot give birth to a brown-eyed child. Dark skin and dark hair are also dominant genes, so because of evolution, it must mean that the ancestors of humanity had dominant genes.
Since the gene for HD is dominant, there is a 50% chance of a sufferer's
Albinism is a very serious disease that could end up in death. Albinism is a recessive inherited defect in melanin, which is metabolism in which pigment is absent from skin, hair, and eyes. Albinism in hair, skin, and eyes is called oculocutaneous albinism. Humans that have oculocotaneous albinism are not able to produce melanin. These people have white, yellow, or yellow brown hair, very light ( usually blue ) eyes, and very pale skin. Their eyes may appear pink because they have very little pigment.
The images formed on the two retinas are so unlike that they cannot be blended in the brain. Thus, a double image is perceived. The condition is known as diplopia, or double vision. Prismatic lenses are prescribed to correct this defect.Imperfections in the cones of the retina, resulting from heredity or disease, cause defective color vision. This is known as color blindness, or Daltonism. In total color blindness, everything appears in shades of gray.