Article
Upper beak truncation in chicken embryos with the cleft primary palate mutation is due to an epithelial defect in the frontonasal mass.
Developmental dynamics : an official publication of the American Association of Anatomists - 1 Jun 2004
MacDonald Mary E, Abbott Ursula K, Richman Joy M
Abstract excerpt
In this study, we used the chicken mutant strain known as cleft primary palate (cpp) to study the mechanisms of beak outgrowth. cpp mutants have complete truncation of the upper beak with normal development of the lower beak. Based on structural analysis and grafts of facial prominences, we localized the defect to the frontonasal mass and its derivatives. Several explanations that would account for the outgrowth...
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