Hormone-Induced Sexual Differentiation of Brain and Behavior in Zebra Finches

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Science  20 Jun 1980:
Vol. 208, Issue 4450, pp. 1380-1383
DOI: 10.1126/science.208.4450.1380


The male zebra finch sings, whereas the female does not. This behavioral dimorphism is correlated with the presence of morphological sex differences within the neural substrate that mediates this behavior, the song system. When a female chick is exposed to 17β-estradiol her song system is subsequently masculinized. Either testosterone or 5α-dihydrotestosterone may then induce such a female to sing when an adult.

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