Chapter 3C

2. every genetic influence, from prenatal nutrition to the people and things around us.
4. the principle that, among the range of inherited trait variations, those that lead to increased reproduction and survival will most likely be passed on to succeeding generations.
6. the biochemical units of heredity that make up chromosomes; segments of DNA capable of synthesizing a protein.
8. the interplay that occurs when the effect of one factor depends on another factor.
11. the subfield of biology the molecular structure and function of gene.
13. the proportion of variation among individuals that we can attribute to genes.

1. threadlike structures made of DNA molecules that contain the genes.
2. the study of the evolution of behavior and the mind, using principles of natural selection.
3. twins who develop from separate fertilized eggs. They only share a fetal environment and are not genetically the same.
5. the study of the relative power and limits of genetic and environmental influences on behavior
7. deoxyribonucleic acid; a complex molecule containing the genetic information that makes up the chromosomes.
9. a random error in gene replication that leads to a change.
10. the complete instructions for making an organis, consisting of all the genetic material in that organism’s chromosomes.
12. twins who develop from a single fertilized egg that splits in two, creating two genetically identical organism.