Sex Structure
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• The sex structure refers to the proportions of the 2 sexes in a defined population.
• It is expressed as the number of males to every 100 females.
• Male births usually exceed female births, but males die off more quickly in infancy, so by the time children are 1 yr old, there are more females than males.
• The sex structure may be affected by the following
  • Where women are considered subordinate beings, they suffer a higher mortality rate and a lower life expectancy.
  • Migration. There is usually a dominance of males in populations dominated by immigrants.
  • In difficult environments, there is usually an imbalance in favor of males.
  • Select populations such as military towns may have an imbalance for either of the sexes.
  • Urban areas in developing regions have more males.

Other Notes in this Category

1. Age Structure
2. Components of Population
3. Factors affecting mortality
4. Malthus
5. Migration
6. Population Geography and Demography
7. Sex Structure
8. Spearman's Rank Correlation
9. Theories of Population

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