In this lecture, our instructor, Charles Schallhorn talks about behavioral genetics and evolutionary psychology. He goes over the concept of nature vs. nurture, heredity, DNA, and dominant and recessive genes.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
Objective: Discuss Psychology's Abiding Interest in How Heredity, Environment, and Evolution Work Together to Shape Behavior
What Influences do our Genetics Have on Our Behavior, Both as an Individual, as Well as in Groups?
Nature Versus Nurture 0:34
Nature Refers to Heredity, a Person's Biological Makeup
Nurture Refers to the Environment, a Person's Life Experiences, Family and Education
Developmental Psychology: The Study of Progressive Changes in Behavior and Abilities
Heredity (Nature): Transmission of Physical and Psychological Characteristics From Parents to Their Children Through Genes
DNA (Deoxyribonucleic Acid): Molecular Structure Shaped Like a Double Helix That Contains Coded Genetic Information
Genome: The Entirety of an Organism's Hereditary Information (Includes Info Coded in DNA or RNA)
Genes: Specific Areas on a Strand of DNA That Carry Hereditary Information
Genetic Makeup 2:46
DNA (Deoxyribonucleic Acid) is the Means by Which Heredity Characteristics Pass From One Generation to the Next
Fraternal Twins are Dizygotic Twins That Develop From the Union of Two Separate Sperms and Eggs
Identical Twins are Monozygotic Twins That Develop From the Union of the Same Egg and Sperm That Have Split and Have Exactly the Same Genotype (May Have the Same Genes, But Not Necessarily the Same Number of Copies of Those Genes)
Genetic Building Blocks 4:13
The Human Body Contains 100 Trillion Cells
There is a Nucleus Inside Each Human Cell (Except Red Blood Cells)
Each Nucleus Contains 46 Chromosomes, Arranged in 23 Pairs
One Chromosome of Every Pair is From Each Parent
The Chromosomes are Filled With Tightly Coiled Strands of DNA.
Genes are Segments of DNA That Contain Instructions to Make Proteins -- The Building Blocks of Life
Picture of What is Inside a Chromosome
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
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 in Size, and the Chemical Molecules That Make Up DNA are Even Smaller
Gene Patterns: Eye Color 7:01
Dominant and Recessive Traits
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, One out of Every Four Children Will Be Blue-Eyed
There is a Significant Chance That Two Brown-Eyed Parents Will Have a Blue-Eyed Child
Dominant Recessive 7:43
Graphic Depicting All the Eye Color Combinations a Brown-Eyed Mother and Brown-Eyed Father Could Have
Temperament and Environment 9:53
Temperament: The Physical Core of Personality; Includes Sensitivity, Irritability, Distractibility, and Typical Mood
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