what is sex ratio and why has sex ratio being explain any four season
Answers
In the human species the ratio between males and females at birth is slightly biased towards the male sex. The natural “sex ratio at birth” is often considered to be around 105. This means that at birth on average, there are 105 males for every 100 females.
Nature provides that the number of newborn males slightly outnumber newborn females because as they grow up, men are at a higher risk of dying than women not only due to sex differentials in natural death rates, but also due to higher risk from external causes (accidents, injuries, violence, war casualties). Thus, the sex ratio of total population is expected to equalize. Instead if a country’s population sex ratio does not equalize or rather exceeds* the 105-threshold, it means societies with a dominating preference for male child tend to intervene in nature and reduce the number of born girl child by sex-selective abortion and infanticide.
(*An under-registration of female births also contributes to sex ratios at birth above the natural level).
Because women account for one-half of a country’s potential, balanced sex ratio is desirable. Besides, gender imbalances have been known in human history to cause serious negative consequences for the society in the long run.
no of femal per thousand male is called sex ratio