 | Guideposts for Study
(See related pages)
| 3.1 | How does conception normally occur, and how have beliefs about conception changed? | | 3.2 | What causes infertility, and what are alternative ways of becoming parents? | | 3.3 | What genetic mechanisms determine sex, physical appearance, and other characteristics? | | 3.4 | How are birth defects and disorders transmitted? | | 3.5 | How do scientists study the relative influences of heredity and environment, and how do heredity and environment work together? | | 3.6 | What roles do heredity and environment play in physical health, intelligence, and personality? |
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