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A. DNA

A. DNA. A gene that actively controls the expression of a trait is called ___gene. A. recessive B. dominant C. mutated D. chromosome. B. dominant. _____refers to hereditary and ___refers to environmental influences. A. nature, nurture B. cognition, emotion C. Nurture, behavioral genetics

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A. DNA

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  1. A. DNA

  2. A gene that actively controls the expression of a trait is called ___gene • A. recessive • B. dominant • C. mutated • D. chromosome

  3. B. dominant

  4. _____refers to hereditary and ___refers to environmental influences • A. nature, nurture • B. cognition, emotion • C. Nurture, behavioral genetics • D. longitudinal, cross sectional

  5. A. nature, nurture

  6. Sierra has blond hair although her parents both have brown hair. What do we know about Sierra’s parents? • A. At least one of her parents has a recessive gene for blond hair • B. each of her parents must have one recessive gene for blond hair • C. each of her parents must have a dominant gene for blond hair • D. Neither of her parents has a gene for blond hair

  7. B. each of her parents must have one recessive gene for blond hair

  8. Ovum is a term used to describe? • A. the female sex cell or egg • B. male sex cell • C. the conception stage • D. fertilization

  9. Ashley and Mary Kate Olsen are genetically identical. What type of twins are they ? • A. monozygotic twins • B. fraternal twins • C. dizygotic twins • D. wombmates

  10. A. the female sex cell or egg

  11. Human Development & Research • Scientific study of the changes that occur in people as they age • Longitudinal design-research design where one person or group of people is studied, adv./disadvantage. • Cross sectional design-research design studying several different age groups at one time, adv./disadvantage. • Cross sequential design- combo. Of longitudinal & cross sectional designs

  12. Nature v. Nurture Nature Nurture • Hereditary • Personality characteristics • Social interactions • Environment • Media • Social Supports

  13. Prenatal Development • Genetics-science of hereditary • DNA-molecule made up of unique genetic codes • Genes-section of DNA strand • Chromosomes-rod shaped structure where the genes are located • Dominant gene-actively controls the expression of a trait • Recessive gene-less active gene in influencing traits

  14. Chromosome Problems • Cystic Fibrosis • Sickle cell anemia • Tah-Sachs disorder • PKU • Down Syndrome • Klinefelter’s syndrome • Tunner’s syndrome

  15. Conception to birth • Egg=ovum • Egg and Sperm join=fertilization • Identical twins=monozygote • Fraternal twins=dizygotic • Conjoined twins • Teratogens=any factor that could cause a birth defect: drug, chemical, virus, etc. Table 7.2 • Germinal period, embryonic period, and fetal period

  16. Germinal Period of Pregnancy • 2 weeks after the fertilization of the egg • Attaches itself to the wall of the uterus • Placenta • Umbilical cord

  17. Embryonic Period • 2 weeks after conception to 8 weeks • Organ development • Nourishment • Environmental influences

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