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- 17. Jean Piaget Cognitive Development
- 35. Mother vs. Father Child Care Australian Study: 1400 Families
- 48. Females - age 13 vs. Males - age 16
Hinweis der Redaktion
- FIGURE 3.1 (Top left) Linked molecules (organic bases) make up the “rungs” on DNA’s twisted “molecular ladder.” The order of these molecules serves as a code for genetic information. The code provides a genetic blueprint that is unique for each individual (except identical twins). The drawing shows only a small section of a DNA strand. An entire strand of DNA is composed of billions of smaller molecules. (Bottom left) The nucleus of each cell in the body contains chromosomes made up of tightly wound coils of DNA. (Don’t be misled by the drawing: Chromosomes are microscopic, and the chemical molecules that make up DNA are even smaller.)
- FIGURE 3.3 Gene patterns for children of brown-eyed parents, where each parent has one brown-eye gene and one blue-eye gene. Because the brown-eye gene is dominant, 1 child in 4 will be blue-eyed. Thus, there is a significant chance that two brown-eyed parents will have a blue-eyed child.
- FIGURE 3.8 Motor development. Most infants follow an orderly pattern of motor development. Although the order in which children progress is similar, there are large individual differences in the ages at which each ability appears. The ages listed are averages for American children. It is not unusual for many of the skills to appear 1 or 2 months earlier than average or several months later (Harris & Liebert, 1991). Parents should not be alarmed if a child’s behavior differs some from the average.
- FIGURE 3.12 In the United States, about two thirds of all children from middle-class families are securely attached. About 1 child in 3 is insecurely attached. (Percentages are approximate. From Kaplan, 1998.)