Albinism

English: Albinism (from Latin albus, meaning "white") is a lack of pigmentation in the eyes, skin and hair. It is an inherited condition resulting from the combination of recessive genes passed from both parents of an individual. This condition is known to affect mammals, fish, birds, reptiles, and amphibians.
Español: El albinismo es una condición natural genética en la que hay una ausencia congénita de pigmentación de ojos, piel y pelo en los animales. También aparece en los vegetales, donde faltan otros compuestos como los carotenos. Es hereditario; aparece con la combinación de los dos padres portadores del gen recesivo.
Deutsch: Albinismus (lat. albus : weiß) ist eine Sammelbezeichnung für angeborene Störungen in der Biosynthese der Melanine und dem daraus resultierenden Mangel an Pigmenten in Haut, Haaren und Augen (Rotfärbung der Iris aufgrund des durchschimmerndes Blutes). Die Betroffenen nennt man Albinos oder Dondos.
Português: Albinismo (do latim albus, que significa branco) é uma deficiência de melanina nos olhos, pele e cabelo. Essa doença é uma condição hereditária, resultada da combinação de genes recessivos passados por ambos os pais ou por apenas um dos dois. É conhecida por afetar mamíferos, peixes, aves, répteis e anfíbios.

PeopleEdit

AnimalsEdit

Some of these animals may be leucistic

Variations of AlbinismEdit

For these animals is known that they are albinotic and not Leucistic.


OCA1 (Oculocutaneous Albinism Type 1) - Albinism-Locus (C)Edit

Siamese, Colorpoint, HimlayanEdit

  • English: Animals with temperature-sensitive tyrosinase, OCA1
  • Deutsch: Tiere mit temperaturempfindlicher Thyrosinase, OCA1

OCA2 - Pink Eye Dilution (P)Edit

OCA3 - Brown-LocusEdit

OCA4 - Cream gene mutation of the horseEdit

English: For additional examples see: Cream gene of the horse
Deutsch: Weitere Beispiele unter Cream Gen des Pferdes
  • Source: Denis Mariat, Sead Taourit, and Gérard Guérin; "A mutation in the MATP gene causes the cream coat colour in the horse"; Genet. Sel. Evol. 35 (2003) pp. 119–133, INRA, EDP Sciences, 2003 DOI: 10.1051/gse:2002039

Amelanism - Eumelanin and Pheomelanin absentEdit

See also: Category:Amelanism

This form of albino lacks black pigment and red pigment, but possesses yellow pigment. Animals shown are also Tyrosinase negative, lacking brown pigment. T-positive forms also exist.

Hypomelanism - Eumelanin dilutedEdit

This form has melanin noticeably diluted, resulting in a very faded appearance.

Only or mainly Pheomelanin dilutedEdit

  • English: Animals, where only oder mainly phäomelanin is diluted as in "chinchilla" color variation of rabbits.
    Deutsch: Tiere, bei denen hauptsächlich oder ausschließlich Phäomelanin aufgehellt ist, wie beispielsweise bei der Chinchillafärbung des Kanainchens.
  • Category:White tigers -
    Deutsch: weiße Tiger sind nicht leuzistisch. Leuzistische Tiger hätten kein durchgehend vorhandenes Streifenmuster, da ihnen an einigen Stellen die Melanozyten fehlen würden.
    English: white tigers are not leucistic, they have a similar form of albinism as rats or rabbits with the coat color called "chinchilla". In leucistic tigers the stripes would miss in some places, because of melanocytes missing there.

Only or mainly Eumelanin dilutedEdit

ReferecesEdit

  1. Protas ME, Hersey C, Kochanek D, Zhou Y, Wilkens H, Jeffery WR, Zon LI, Borowsky R, Tabin CJ: Genetic analysis of cavefish reveals molecular convergence in the evolution of albinism. Nat Genet. 2006 Jan;38(1):107-11. Epub 2005 Dec 11. PMID 16341223
Last modified on 16 August 2012, at 16:59