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

The drive to make more milk has had an unsavory side effect: Cows have become more genetically similar and less fertile. Scientists are trying to recover valuable genetic variation that was lost.(Image credit: Dan Charles/NPR)

From http://besthealthnews.com/2019/10/most-u-s-dairy-cows-are-descended-from-just-2-bulls-thats-not-good/?utm_source=rss&utm_medium=rss&utm_campaign=most-u-s-dairy-cows-are-descended-from-just-2-bulls-thats-not-good

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From https://aubreyflores.blogspot.com/2019/10/most-us-dairy-cows-are-descended-from.html

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From https://christinowlin.blogspot.com/2019/10/most-us-dairy-cows-are-descended-from.html

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