sex ratio
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noun Sociology.
the proportional distribution of the sexes in a population aggregate, expressed as the number of males per 100 females.
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Origin of sex ratio
First recorded in 1905–10
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for sex ratio
A modification of the sex-ratio and of other ratios through linkage.
Sex-linked Inheritance in Drosophila|Thomas Hunt MorganTwo sex-linked lethal factors in Drosophila and their influence on the sex-ratio.
Sex-linked Inheritance in Drosophila|Thomas Hunt MorganFrom an F2 culture that gave practically a 2:1 sex-ratio, vermilion females were bred to club males.
Sex-linked Inheritance in Drosophila|Thomas Hunt MorganThe former are always normal in behavior, and the latter repeat in their descendants the 2:1 sex-ratio.
Sex-linked Inheritance in Drosophila|Thomas Hunt Morgan
Medicine definitions for sex ratio
sex ratio
n.
The proportion of males to females in a given population, usually expressed as the number of males per 100 females at a specific stage in life, especially at conception, birth, and a given stage between birth and death.
The ratio of the numbers of males to females affected by a particular disease or trait.
The American Heritage® Stedman's Medical Dictionary
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