CPChapter2

CPChapter2 - Chapter Two Heredity and the Environment...

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4/7/11 Chapter Two Heredity and the Environment
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4/7/11 The Process of Genetic Transmission Genotype – a specific set of genes inherited from one’s parents Only identical twins have identical genotype Phenotype – observable and
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4/7/11
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4/7/11 The Process of Genetic Transmission Oviduct – sperm and egg unite here Zygote – a new organism Ovum – female egg, the largest cell of human body Sperm – male fertilization cell, the smallest cell in body
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4/7/11
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4/7/11 Mechanisms of Inheritance DNA found in the organism’s chromosomes 22 pairs of autosomes 1 pair of sex chromosomes Mitosis Cell division, allows each new cell to contain the organism’s unique 46 chromosomes Meiosis Reproduction of sex cells, produce gametes
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4/7/11 Inside the Chromosome DNA is composed of 4 bases Adenine, thymine, guanine, and cytosine Gene: section of DNA Alleles: location of a gene for a particular trait
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4/7/11 Genetic Influences on Genes never work in isolation Transmission of Traits: A Basic Model Alleles – alternative forms of a gene Homozygous – alleles from both parents are the same for a specific gene or trait
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4/7/11 Mendel’s Principles of Genetic Transmission Phenotype v. Genotype Principle of dominance Dominant and recessive genes Principle of segregation Each inheritable trait passed on separately Principle of independent assortment Gene for one trait, does not affect other
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4/7/11
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4/7/11 Genetic Influences on Development Transmission of Traits: A Basic Model Codominance pattern of two alleles Dominant allele
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4/7/11 Principles of Inheritance Polygenic inheritance Traits are affected by multiple genes Incomplete dominance A gene may not be entirely recessive or dominant Codominance Both genes for a trait dominant, so both are expressed
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This note was uploaded on 04/07/2011 for the course PSYC 2076 taught by Professor Staff during the Fall '10 term at LSU.

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CPChapter2 - Chapter Two Heredity and the Environment...

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