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Old 07-23-2010, 01:12 PM   #1
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cow Chondrodysplasia, Dexter Cattle

Chondrodysplasia
Carol Davidson, 2008
American Dexter Cattle Association

Genetics Information
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Dexter cattle have a unique genetic mutation that causes defective bone growth. This mutation is referred to as chondrodysplasia, and it results in the animals appearing heavy bodied on short legs. There is a large variation in effect of this single-gene mutation, with some animals being proportionate and very attractive, while others are strongly disproportionate with a dwarf-like appearance. The degree of dwarfism expressed is not consistent. At this time, the cause for the variation is not known. Carriers of this gene appear to be much more heavily muscled, but this is because muscle that is designed to attach to a normal bone is actually compressed onto a shortened one, causing the muscle to bulge. Carriers often show a greater spring of rib or can be potbellied because the organs retain their normal size yet must fit within the reduced skeletal framework, or drop below it.

The mutation affects the chondrocytes, which are minute particles of specialized cartilage that ossify to form bones. Chondrocytes are shaped rather like...
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Old 07-24-2010, 07:12 AM   #2
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Sounds like a pretty ugly thing to reduce them to once it's stated that way...
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Carriers often show a greater spring of rib or can be potbellied because the organs retain their normal size yet must fit within the reduced skeletal framework
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