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Science 8 July 1966:
Vol. 153. no. 3732, pp. 184 - 185
DOI: 10.1126/science.153.3732.184
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Articles

Hypophyseal Control of Genetic Expression during Chick Feather and Skin Differentiation

Milton B. Yatvin 1

1 Department of Radiology, University of Wisconsin Medical School, Madison

The normal sequence of molecular events which occurs during feather and skin differentiation in the chick embryo is interrupted by pituitary gland ablation. The characteristic pattern of development is reestablished in hypophysectomized embryos treated with pituitary extract and in hypophysectomized embryos in parabiotic union with their twins within a double-yolked egg. These results suggest that genetic expression in differentiating chick feather and skin after day 12 of incubation is regulated by hormones.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)