Why Do We Have More Boys Than Girls?

The video explores the natural and biological factors influencing the sex ratio at birth, revealing a natural skew towards more male births. It explains that while more male zygotes are conceived, they face higher risks of miscarriage and mortality. Environmental conditions, such as famine or wealth, can further influence the likelihood of male births. The video also discusses reproductive strategies, highlighting that males face more competition and risks but have the potential for greater reproductive success when conditions are favorable.

What is the natural birth ratio of boys to girls?

• 100 boys for every 100 girls

• 106 boys for every 100 girls

• 150 boys for every 100 girls

• 90 boys for every 100 girls

How do a mother's living conditions during pregnancy affect the likelihood of having a boy?

• They have no effect

• They only affect the likelihood of having a girl

• Worse conditions increase the likelihood of having a boy

• Better conditions increase the likelihood of having a boy

What happened to the birth ratio during the 1960s famine in China?

• The birth ratio remained unchanged

• More girls were born

• Fewer boys were born

• More boys were born

Why are female offspring considered a safer biological investment?

• They are more likely to survive infancy

• They are almost guaranteed to reproduce

• They are less likely to face violence

• They require fewer resources

Why might male offspring be considered a riskier investment in tough times?

• They are less likely to survive infancy

• They are more prone to diseases

• They require more resources

• They are more likely to die and not reproduce