Across
- 5. adulthood a period from about age 18 to the mid-twenties, when many in Western cultures are no longer adolescents but have not yet achieved full independence as adults.
- 6. Stage in Piaget’s theory, the stage (from birth to nearly 2 years of age) at which infants know the world mostly in terms of their sensory impressions and motor activities.
- 10. Operational Stage in Piaget’s theory, the stage of cognitive development (from about 7 to 11 years of age) at which children gain the mental operations that enable them to think logically about concrete events.
- 11. Stage In Piaget’s theory, the stage (from about 2 to 6 or 7 years of age) in which a child learns to use language but cannot yet perform the mental operations of concrete logic.
- 12. being productive and supporting future generations
- 13. the study of the molecular ways by which environments can influence gene expression (without a DNA change).
Down
- 1. study research that compares people of different ages at the same point in time.
- 2. the biochemical units of heredity that make up the chromosomes; segments of DNA.
- 3. Twins individuals who developed from a single fertilized egg that split in two, creating two genetically identical siblings.
- 4. operational Stage in Piaget’s theory, the stage of cognitive development (normally beginning about age 12) at which people begin to think logically about abstract concepts.
- 7. studies research that compares people of different ages at the same point in time.
- 8. agents, such as chemicals or viruses, that can reach the embryo or fetus during prenatal development and cause harm.
- 9. threadlike structures made of DNA molecules that contain the genes.