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Genetics

Genetics. 7 th Grade Science Biology (DNA) Clinton County Middle School. Objectives. Describe the combination of traits in organisms Identify where hereditary information is contained Identify parts of DNA molecule and its structure Explain how DNA copies itself

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Genetics

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  1. Genetics 7th Grade Science Biology (DNA) Clinton County Middle School

  2. Objectives • Describe the combination of traits in organisms • Identify where hereditary information is contained • Identify parts of DNA molecule and its structure • Explain how DNA copies itself • Describe structure and function of each kind of RNA

  3. Bell Ringer • Pass out Ecology Test • Take 2 minutes to look over test • Go over answers to test • Check for miscalculations • Discuss Class average • Did you or did you not meet goal? What can we do better?

  4. Key Vocabulary • Chromosome • Tight coils of DNA • Eukaryote • A cell that has a membrane-bound nucleus • Prokaryote • A cell whose nucleus is not bound by a membrane • Gene • a specific sequence of DNA nucleotides that carry hereditary traits • Trait • Genetic characteristics of an individual

  5. DNA • Aka-Deoxyribonucleic Acid (DNA) • 99.9% of DNA is the same in all humans • Only 0.1% of your DNA is unique to you! • Scientist knew about DNA since mid-1800’s • In 1952, scientist Rosalind Franklin discovered DNA’s 2 chains • In1953, using work of Franklins, James Watson and Francis Crick made a model of a DNA molecule

  6. Nitrogenous Base Pairs • Adenine (A) • Thymine (T) • Cytosine (C) • Guanine (G) • Adenine---Thymine • Cytosine--Guanine

  7. Quiz Time • Which Nitrogenous pairs, pair up in a double helix of DNA? • In 1952, who was the scientist that discovered that DNA had 2 chains? • Watson and Crick created a model of what?

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