Medical

W-chromosome

the smaller of the two SEX CHROMOSOMES in female birds and LEPIDOPTERANS, being equivalent to the Y-chromosome in male mammals. See also Z-CHROMOSOME, SEX DETERMINATION.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

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Z-chromosome

References in periodicals archive

Naturally, the combination of Z- and metacentric W-chromosome produces all females.

Effects of Dibutyl Phthalate as an Environmental Endocrine Disruptor on Gonadal Sex Differentiation of Genetic Males of the Frog Rana rugosa

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