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2: Conception, Heredity, and Prenatal Development
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- Evaluate roles of nature and nurture in development.
- Define genes and chromosomes.
- Differentiate mitosis and meiosis.
- Explain dominant and recessive patterns on inheritance.
- List common genetic disorders and chromosomal abnormalities.
- Describe changes that occur within each of the three periods of prenatal development.
- Recognize the risks to prenatal development posed by exposure to teratogens.
- Evaluate different types of prenatal assessment.
- 2.1: Heredity
- Most scholars agree that there is a constant interplay between nature (heredity) and nurture (the environment). It is difficult to isolate the root of any single characteristic as a result solely of nature or nurture, and most scholars believe that even determining the extent to which nature or nurture impacts a human feature is difficult to answer. In fact, almost all human features are polygenic (result of many genes) and multifactorial (result of many factors, both genetic and environmental).
- 2.2: Prenatal Development
- Now we turn our attention to prenatal development which is divided into three periods: The germinal period, the embryonic period, and the fetal period. The following is an overview of some of the changes that take place during each period.
- 2.S: Summary