Biological sexual

The relationship between the various levels of biological sexual differentiation is fairly well understood. Many of the biological levels are said to cause, or at least shape, the next level. For example, in most people, the presence of a Y chromosome causes the gonads to become testes, which produce hormones that cause the internal and external genitalia to become male, which in turn lead parents to assign 'male' as the sex of their child (assigned sex), and raise the child as a boy (gender of rearing). However, the degree to which biological and environmental factors contribute to the psychosocial aspects of sexual differentiation, and even the interrelationships between the various psychosocial aspects of differentiation, is less well understood as illustrated by the ongoing nature versus nurture debate. Unfortunately, because of a lack of focus on this area, studies may use data from research not designed to discern the role of sex. One sample of 432 papers publishing the results of gender-related genetics found that only 66.6% of them had set out to deal with the subject before conducting any research and 87.3% used unsound statistics