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
from
https://healthnews010.tumblr.com/post/188421456268
from https://johnher1.blogspot.com/2019/10/most-us-dairy-cows-are-descended-from.html
from
https://johnher10.tumblr.com/post/188421522322
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