Final answer:
The statement that without environmental pressures, everyone would have a 50% chance of becoming left-handed is not entirely accurate. Handedness is influenced by genetic and environmental factors such as cultural norms and tool use. The actual percentage of left-handed individuals would depend on various factors.
Step-by-step explanation:
The statement suggests that without environmental pressures, everyone would have a 50% chance of becoming left-handed. However, this is not entirely accurate. Handedness is influenced by a combination of genetic and environmental factors. While genetic factors play a significant role in determining handedness, environmental pressures such as cultural norms and the use of tools can also impact handedness.
For example, in many societies where right-handedness is considered the norm, left-handed individuals may be encouraged or forced to switch to using their right hand. Similarly, the development of tool use, which is more common in right-handed individuals, may have influenced the prevalence of right-handedness in humans.
Therefore, without environmental pressures, it is unclear whether exactly 50% of individuals would be left-handed. The actual percentage would likely be influenced by a complex interplay of genetic and environmental factors.