Chapter 4: Genes and Environment
Learning Objectives
- Describe genetic components of conception
- Describe genes and their importance in genetic inheritance
- Describe chromosomal abnormalities
- Explain the value of prenatal testing
- Describe the interaction between genetics and the environment
- Compare monozygotic and dizygotic twins
In this section, we will look at some of the ways in which heredity helps to shape the way we are. Heredity involves more than genetic information from our parents. According to evolutionary psychology, our genetic inheritance comes from the most adaptive genes of our ancestors. We will look at what happens genetically during conception and take a brief look at some genetic abnormalities. Before going into these topics, however, it is important to emphasize the interplay between heredity and the environment. Why are you the way you are? As you consider some of your features (height, weight, personality, health, etc.), ask yourself whether these features are a result of heredity, or environmental factors, or both. Chances are, you can see the ways in which both heredity and environmental factors (such as lifestyle, diet, and so on) have contributed to these features.
