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lethal Archive
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The Unfortunate Case of the Wild Australian Shepherd
Posted on March 23, 2011 | 93 CommentsThe Australian Shepherd is a breed that has been constructed to maximize two different lethal semi-dominant traits: Merle and Bobtail. Without the careful hand of breeders to prevent Merle x […] -
Lethal Semi-Dominant: Bobtail
Posted on March 21, 2011 | 26 CommentsSemi-dominant alleles are those that are less potent in heterozygous form (one copy) than they are in homozygous form (two copies), but which are potent enough to show a difference […] -
Lethal Semi-Dominant: Merle
Posted on March 18, 2011 | 52 CommentsWe learned before that recessives are dangerous because when they are doubled up it often means that a vital bodily process is entirely broken leading to disease. Recessive disease is […]