ch 3 notes - Chapter 3 1 Evolutionary psychology emphasizes...

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Chapter 3 1. Evolutionary psychology - emphasizes the importance of adaptation, reproduction, and “survival of the fittest” in shaping behavior 2. Chromosomes - threadlike structures that come in 23 pairs, one member of each pair coming from each parent. Chromosomes contain the genetic substance DNA. DNA - a complex molecule that contains genetic information Genes - units of hereditary information composed of DNA. Genes direct cells to reproduce themselves and manufacture the proteins that maintain life Critical period - fixed time in development when certain behaviors optimally emerge Mitosis - cellular reproduction in which the cell’s nucleus duplicates itself with two new cells being formed, each containing the same DNA as the parent cell, arranged in the same 23 pairs of chromosomes Meiosis - a specialized form of cell division that occurs to form eggs and sperm (gametes) Fertilization - a stage in reproduction whereby an egg and an sperm fuse to create a single cell, called a zygote Zygote
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