Conceiving a New Life
Changing Theories of Conception
How Fertilization Takes Place
Infertility
Causes of Infertility
Treatments for Infertility
Alternative Ways to Parenthood: Assisted Reproductive Technology
Mechanisms of Heredity
The Genetic Code
What Determines Sex?
Patterns of Genetic Transmission
Genetic and Chromosomal Abnormalities
Dominant or Recessive Inheritance of Defects
Sex-Linked Inheritance of Defects
Chromosomal Abnormalities
Genetic Counseling and Testing
Nature and Nurture: Influences of Heredity and Environment
Studying the Relative Influences of Heredity and Environment
How Heredity and Environment Work Together
Some Characteristics Influenced by Heredity and Environment
Physical and Physiological Traits
Intelligence
Personality
Psychopathology
Summary and Key Terms
Boxes
3-1 The Everyday World: Multiple Births
3-2 The Research World: Genetic Testing
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