Abstract
SEX is the term used to define the differentiation of individuals for the production of dissimilar gametes-the ova and the sperm. A male is an individual efficiently equipped for the elaboration of functional spermatozoa and for the conveyance of these towards the site of fertilisation. A female is an individual equipped for the elaboration of functional ova, for the conveyance of these towards the site of fertilisation, and often also for the transit of the zygote—the fertilised egg—at some stage of its development to the exterior. Associated with these differences in the internal and external reproductive organs there are others in the general characterisation, the phenotype, by which male and female can be distinguished on inspection. Further, the sexes can be distinguished by differences in the chromosome constitution of the cells of which the individual is built up.
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CREW, F. Sex-Determination. Nature 115, 574–577 (1925). https://doi.org/10.1038/115574a0
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DOI: https://doi.org/10.1038/115574a0