Chromosomes & DNA Replication

Slides:



Advertisements
Similar presentations
End Show Slide 1 of 37 Copyright Pearson Prentice Hall Biology.
Advertisements

End Show Slide 1 of 37 Copyright Pearson Prentice Hall Biology.
DNA. 12–1 DNA Griffith and Transformation I Griffith and Transformation In 1928, British scientist Fredrick Griffith was trying to learn how certain.
12.1 Identifying the Substance of Genes
Copyright Pearson Prentice Hall
DNA and Heredity. DNA and Heredity DNA is found in the cell’s __nucleus_______. DNA is found in the cell’s __nucleus_______. In the nucleus, we find the.
End Show Slide 1 of 37 Copyright Pearson Prentice Hall 12–1 DNA.
1 Review List the conclusions that Griffith and Avery drew from their experiments Identify Variables What experimental variable did Avery use when he.
Copyright Pearson Prentice Hall. Griffith and Transformation  1928, British scientist Fredrick Griffith was trying to learn how certain types of bacteria.
DNA Structure. Frederick Griffith In 1928, Frederick Griffith wanted to learn how certain types of bacteria produce pneumonia Griffith injected mice with.
12-1 DNA.
DNA: The Stuff of Life. Griffith and Transformation In 1928, British scientist Fredrick Griffith was trying to learn how certain types of bacteria caused.
Chapter 12- DNA BIG IDEA: What is the structure of DNA, and how does it function in genetic inheritance?
“The Blueprint of Life”
Section * 1928 British scientist – Frederick Griffith * Wanted to know how bacteria made people sick, especially pneumonia * Griffith isolated 2.
12–1 DNA Photo credit: Jacob Halaska/Index Stock Imagery, Inc.
DNA: The Stuff of Life. Griffith and Transformation In 1928, British scientist Fredrick Griffith was trying to learn how certain types of bacteria caused.
Unit 3 Nucleic Acids. Nucleic Acid-  A large complex organic molecule that stores and transmits genetic information  DNA & RNA.
It’s the DNA! The information is in the DNA!. DNA History Griffith (1928)– Experimented on mice and observed some harmless strains of bacteria could change.
DNA.
CHAPTER 12 DNA AND RNA DNA Griffith and Transformation In 1928, a British scientist Frederick Griffith was trying to figure out how certain types.
DNA Structure and Replication
Unit 4 Genetics Ch. 12 DNA & RNA.
NUCLEIC ACIDS Chapter 12 DNA and RNA. Where did we find Genes and who discovered them?  In 1928 Frederick Griffith tried to figure out how bacteria made.
Ch. 9 How Genes Work. Ch. 9-1 Understanding DNA How Scientists Identified the Genetic Material Scientists knew that chromosomes were involved in the transmission.
DNA and RNA Chapter 12. Griffith Studied disease in humans in 1928 Wanted to know how certain types of bacteria cause pneumonia Found two strains of pneumonia.
DNA –The Language Of Life
Lesson Overview 12.1 Identifying the Substance of Genes.
Question of the DAY Jan 5 In prokaryotes, DNA molecules are _______ in shape and located in the _________. In prokaryotes, DNA molecules are _______ in.
Chapter 12 By: Cole, Symone and Mel : DNA Grffith’s Experiment & Transformation Transformation is the process when the heat-killed bacteria had.
Review What organelle is the “control center” of the cell? The nucleus What structures are found in the nucleus? Chromosomes What structures are located.
12.1: Identifying the Substance of Genes.  Investigating bacteria and pneumonia  S strain: mouse dies of pneumonia  R strain: mouse lives  Heat-killed.
Objectives 12.1 Identifying the Substance of Genes -Summarize the process of bacterial transformation. -Describe the role of bacteriophages in identifying.
Aim: How does DNA store the genetic information? DNA.
Chapter Identifying the Substance of Genes 12.2 The Structure of DNA 12.3 DNA Replication More DNA
Chapter 8: DNA and RNA Section 8-1: Discovering DNA.
Chapter 12: DNA Lab Biology CP. Chapter 12: DNA 12.1 Identifying the Substance of Genes 12.2 The Structure of DNA 12.3 DNA Replication.
STRUCTURE OF DNA Biology:. DNA and Genes How do genes work? How do they determine the characteristics of organisms? To truly understand genetics, biologists.
The molecule that carries the genetic information in all living things
Chapter 12: DNA and RNA.
Copyright Pearson Prentice Hall
Griffith’s Experiment
DNA Chapter 12.
DNA DNA was identified as the genetic material through a series of experiments.
Mr. Karns Biology DNA.
DNA: The Genetic Material
Discovering DNA: Structure and Replication
DNA.
DNA Structure and Function
Chapter 12.1 DNA.
DNA Photo credit: Jacob Halaska/Index Stock Imagery, Inc.
Identifying the Substance of Genes (12.1)
Section 12-1: Identifying The Substance of Genes
How do genes control what you look like?
Warm Up 1 DNA is made up of Amino acids c. nucleotides
12.1 Identifying the Substance of Genes
What makes a good molecule for storing information
DNA Structure Standard 3.1.1
Griffith finds a ‘transforming principle.’
UNIT: DNA and RNA How is the genetic code contained in DNA and how do cells pass on this information through replication?  I. History of DNA A Griffith.
Copyright Pearson Prentice Hall
DNA.
Chapter 12 DNA and RNA.
DNA.
Griffith finds a ‘transforming principle.’
DNA.
Ch.12-1 Identifying the Substance of Genes
Ch. 12 DNA & RNA What we’ve learned so far… Cells make proteins
What are genes made of and how do they work?
Copyright Pearson Prentice Hall
Presentation transcript:

Chromosomes & DNA Replication

Important Scientist: Griffith Injected mice with four different pneumonia bacteria samples. disease causing = dies harmless = lives heat killed disease causing = lives heat killed disease causing + harmless = dies Some factor from the dead bacteria had “transformed” the harmless bacteria into a disease causing one. Transformation – transferring genetic information from one bacterium to another.

Griffith

Avery repeated Griffith’s experiment but used enzymes to break down the substance used in the transformation. Nucleic acid DNA stores & transmits genetic information.

Hershey & Chase Bacteriophages – virus that infects bacteria. Made of a DNA or RNA core and a protein coat. Wanted to know if the DNA or the protein coat entered the bacteria. Grew viruses containing radioactive isotopes. DNA was the genetic material.

Hershey & Chase

Cell Types Prokaryotes Eukaryotes DNA: cytoplasm a single circular DNA molecule or chromosome Eukaryotes 1000x DNA as prokaryotes DNA: nucleus several chromosomes

DNA Replication Strands are complementary because each strand can be used to make the other strand.

How DNA is Replicated Replication Fork: DNA molecule separates into two strands Each DNA strand serves as a template for the new strands Follow base pairing rule DNA polymerase: enzyme joins nucleotides proofreads each “new” DNA strand

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.