Abstract
MR. PAUL 'SPINASSE has recently pointed out1 some difficulties preventing complete acceptance of the growth rate theory of Lillie and Juhn2 in which bilateral gynandromorphism of individual feathers is supposedly explained. The existence of differences in rates of growth of individual barbs, by which these authors explain different degrees of susceptibility to female hormone, would be proved if, in successive cross sections of a feather, barbs arising near the ventral point fused with the rhachis at a higher level on one side than on the other, but this has never yet been observed.
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References
NATURE, 133, 330, March 3, 1934.
"Physiol. Zool.", 5, 1932.
"Morph. Jahr", 15; 1899.
Bull. Mus. Comp. Zool Harv., 40; 1902.
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HOSKER, A. Bilateral Gynandromorphism in Feathers. Nature 133, 382–383 (1934). https://doi.org/10.1038/133382b0
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DOI: https://doi.org/10.1038/133382b0
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Bilateral Gynandromorphism in Feathers
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