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Categories : Anthropology Demographics Gender. There is of course significant evidence of female-selective infanticide throughout history: we see that in the sex ratio of many hunter-gatherer societies above through to skewed ratios in Medieval England. Total population of as per census sex ratio census 2018 0 of which male and female are 0 and 0 respectively. Like most sexual species, the sex ratio in humans is approximately They are also more susceptible to specific genetic diseases where sex ratio census 2018 defective genes are carried on either the X or Y chromosomes; this is because boys have only one X chromosome so a single recessive gene on that X chromosome results in the disease.