Lecture 2 SRR F-2011

Lecture 2 SRR F-2011 - Biology 313 Lecture 2 August 24,...

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Unformatted text preview: Biology 313 Lecture 2 August 24, 2010 Model genetic organisms are organisms with characteristics that make them useful for genetic analysis How do you know what organism to study? A model plant: Arabidopsis thaliana (mustard) Short generation time. Production of numerous progeny. The ability to carry out controlled genetic crosses. The ability to be reared in a laboratory environment (controlled conditions). The availability of numerous genetic variants. An accumulated body of knowledge about their genetic systems. Characteristics of model organisms Model Genetic Organisms: wide range of species Model organisms are used to understand human diseases Model organisms can be used to understand human diseases WHY?????? Why can a bacterium or a worm give information about human cancer? Mechanism of heredity? Pangenesis (e.g., inheritance of acquired characteristics) 500 BC through 1800s: particles ( gemmules ) produced in body parts and travel to sperm and eggs, which join together to form a zygote giraffe: long neck gemmules ear studs: big hole in ear gemmules Mechanism of heredity? Germ-plasm theory : Cells in reproductive organs contain complete set of genetic information that is passed on to sperm and eggs This theory is accurate Mechanism of heredity? END OF CHAPTER 1 Chapter 2 Chromosomes and Cell Reproduction Today, I will cover the following topics in Chapter 2 1. Prokaryotic and Eukaryotic Cells 2. Prokaryotic cell reproduction 3. Eukaryotic cell reproduction A. chromosomes B. cell cycle and mitosis Problems for Friday (Aug 26) CH 2 (4th Edition) Concept Checks: 2- 4 Worked Problems: 1 & 2 Comprehension and Application Questions/Problems: 1, 3-12 Vocabulary for Friday (Aug 26) Meiosis Crossing over Synapsis Mendel Fertilization Chapter 2 Chromosomes and Cell...
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Lecture 2 SRR F-2011 - Biology 313 Lecture 2 August 24,...

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