genic balance

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A mechanism of sex determination, originally discovered in Drosophila, that depends upon the ratio of X chromosomes to sets of autosomes (A). Males develop when the X/A ratio is 0.5 or less; females develop when the X/A ratio is 1.0 or greater; an intersex develops when the ratio is between 0.5 and 1.0. See Chronology, 1925, Bridges; metafemales, metamales, sex determination.

Subjects: Genetics and Genomics.

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