Survival of patchwork melanoblasts is dependent upon their number in the hair follicle at the end of embryogenesis.

Abstract excerpt

The recessive patchwork (pwk) mutation in mice is associated with a unique hair follicle phenotype. Mice homozygous for patchwork exhibit a variegated coat containing a mixture of white and fully pigmented hairs, but no partially pigmented hairs. We have investigated the etiology of this mutation. We report here that the white hairs result from the lack of melanocytes in the follicle. As indicated by the coat...

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