Psych 101 Ch 3

Psych 101 Ch 3 - Psych 101 1-29-08 Chapter 3: Biological...

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Psych 101 1-29-08 Chapter 3: Biological Foundations of Behavior: Genetics, and the Brain 1. Definition of DNA a. Deoxyribonucleic acid (DNA) i. Complex molecule ii. Shaped like a double helix iii. Contains genetic information b. Sugar-phosphate backbone and 4 bases: i. Adenine, Thymine, Cytosine, and Guanine (don’t need to know these terms, just letters for test day) ii. Rules: 1. A binds to T 2. C binds to G iii. Codon 1. CAG-codes for a specific amino acid 2. 20 amino acids in body 3. A string of amino acids codes a protein or polypeptide chain 2. What are Genes? a. Units of hereditary information—short segments of DNA—that acts as a blueprint for: i. Cell replication ii. Protein manufacturing b. CENTRAL DOGMA: i. DNA---------------- RNA--------------- PROTEIN (transcription) (translation) 3. Definition of Chromosomes
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a. Threadlike structures comprised of thousands of genes, that come in 23 pairs b. n=23 c. XX =female, XY=male d. Autosomes-the first 22 chromosomes (that aren’t the sex chromosome) e. Locus (plural Loci)= ? f.
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This note was uploaded on 05/03/2008 for the course PSYCH 101 taught by Professor Grant during the Spring '08 term at BU.

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Psych 101 Ch 3 - Psych 101 1-29-08 Chapter 3: Biological...

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