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We hope that this information will be useful to investigators who are unfamiliar with mouse breeding or who are fostering transgenic or gene targeted mice for the freshman time. They are open to change and should not be construed as a comprehensive set of rules. We recommend that transgenic founders or chimeras be mated to C57BL/6 mice. Make a lineage for each transgenic founder or embryonic stem cell-mouse chimera. creature mice when they are sexually mature (6 to 8 weeks old). After 6 generations of mating to C57BL/6, more than 99% of the genetic background will be C57BL/6.
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My wife Cathy came home from our son's today and announced that she had found out that twin calves are dropped sterile and/or that they will not breed. Our daughter, then in Veterinary school, came residence and told us the morning she was leaving for school, to put that moo-cow in with the calves on feed and sell her, she wouldn't be any good and that you can't verbalise if they're by looking at them if they're normal, only by girdle exam. I aforesaid that I have always heard that, but do not judge it, as I have never seen technological proof that it is true. Well, the next morning the heifer was in heat, we sorted her out, drove her across the barnyard to the heifers that were with a bull. The heifer forever looked very feminine and as she was a certified Angus, we thought we would give her a chance, so we didn't put her in the machine calves.
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