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November 17, 2019, 2:59 pm UTC    
October 18, 2019 07:25AM
The over use of artificial insemination is not limited to the dairy industry. It is also causing problems in the beef industry. If a popular sire has a genetic defect (unknown at the time) then it is quickly spread through that particular breed. Then years later when the defect is identified and traced back to the source reputable breeders must cull any descendants of that widely used bull from their herds. The problem is that these genetic defects are often caused by a single recessive gene. When an animal carries only one copy of the recessive gene then the defect is not expressed. The problem comes when an animal carries 2 copies of the recessive gene, then the genetic defect is expressed.

"The Stone Age did not end for lack of stone, and the Oil Age will end long before the world runs out of oil"

-- Sheikh Zaki Yamani
Subject Author Posted

Most U.S. Dairy Cows Are Descended From Just 2 Bulls. That's Not Good

Paul H. October 18, 2019 07:03AM

Re: Most U.S. Dairy Cows Are Descended From Just 2 Bulls. That's Not Good

AWSX October 18, 2019 07:25AM



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