Thursday, May 24, 2018

Genetics: mis-marked , Chimera, and Mosaic

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Category: Schnauzer Facts

irish spot BlGenetic Mutations

These colors still are unacceptable but are the result of genetic mutations and not cross-breeding. 

Often these types of mutation are one off genetic mistakes  and can't always be reproduced. 

 

 Note: Merle genes can only occur from Crosbreeding not mutation.

 Excellent site detailing the dangers and mutations linked Directly to the merle gene : http://merleminiatureschnauzers.weebly.com/

 

 

 

irish spot BlGenetic Mutations

These colors still are unacceptable but are the result of genetic mutations and not cross-breeding. 

Often these types of mutation are one off genetic mistakes  and can't always be reproduced. 

 Note: Merle genes can only occur from Crosbreeding not mutation.

 Excellent site detailing the dangers and mutations linked Directly to the merle gene : http://merleminiatureschnauzers.weebly.com/

heterochromia (Greek: heteros 'different' + chroma 'color'[1]) refers to a difference in coloration, usually of theiris but also of hair or skin. Heterochromia is a result of the relative excess or lack of melanin (a pigment). It may beinherited, or caused by genetic mosaicismchimerismdisease, or injury.[2]

 

 

Chimera - a chimera has two sets of DNA, the result of a fusing of two zygotes, and tends to be more obvious by appearance and rarer. chimera or chimaera is a single organism (usually an animal) that is composed of two or more different populations of genetically distinct cells that originated from different zygotes involved in sexual reproduction. If the different cells have emerged from the same zygote, the organism is called a mosaic

Mosaic - mosaic or mosaicism denotes the presence of two or more populations of cells with different genotypes in one individual who has developed from a single fertilized egg

 

 

Mis-marked Examples

Simply stating facts. Mis-marked dogs are according to the breed club, and  standard not actually Miniature Schnauzers regardless of Heritage. In order for a dog to be a full purebred,  it has to meet the breed standard, as well as have traceable parentage. Examples shown here are for education Purposes only. The individual Dog is special,just like every dog is special.  But the mutation it's exhibiting shouldn't be encouraged.  

AKC allowing registration of the animal doesn't change the fact that it doesn't hold up to type. These dogs will still make wonderful pets but they are not truly representatives of there breed.

Genes can be damaged or not copy Properly in varying extents . In some cases a mistake happens early on in development and a part of a gene my revert/mutate to a recessive form. Sometimes only parts of an animal are effected, sometimes the whole Body.

Case Studies of Pure Bred dogs exhibiting Full body recessive traits or Mis-marks after DNA testing has proven no cross breeding.

 

Chocolate/Liver Dogs from Show lines.

B- black , has mutated to bs: bd: bc: - Liver, Brown, or Chocolate 

Black with Large White Spots.

Mis-marked Blacks, patches of White on Chest, Paws , Blazes of color on head, back, or shoulders. 

 

White Recessives / or Color Masked Blacks/Browns.