4/9 Daily Catalyst Pg. 47 Intro to DNA 1. True or false, only eukaryotic cells contain DNA. If false, correct the statement so that it is true. 2. List 3 pieces of evidence we have for the Endosymbiotic theory. 3. In your opinion, why was discovering the structure of DNA more important than discovering DNA itself? 4. Do you feel like you prepared well for the cell test Yesterday?

4/9 Seating Chart

4/9 Class Business Pg. 47 Intro to DNA Unit 5 DNA starts Thursday Quiz #11 on Friday Intro to DNA Unit 4 Extra Credit due Monday, April 13th Find an article on genetics or genetic disease and write a half page summary/opinion on the article. Print out the article and staple your half sheet to the article.

4/9 Agenda Pg. 47 Intro to DNA Daily Catalyst Class Business KWL chart Brain Pop video Intro to DNA Build DNA work time

4/9 Objective We will be able to justify the selection of data from historical investigations that support the claim that DNA is the source of heritable information.

Essential Questions: Who discovered the structure of DNA? What is the structure of DNA How does the structure of DNA relate to its function? How does the structure of DNA allow DNA to be the source of heritable information?

DNA 3 min 3 min

Brain Pop on DNA http://www.brainpop.com/health/freemovies/dna/ We are silent and respectful during Brain Pop **Pay special attention to what is the function of DNA and why is DNA important.**

What are we going to accomplish today? Who/When? How? If you remember, our objective to is know who discovered DNA and what is the structure of DNA and how does this relate to its function.

Deoxyribonucleic Acid The “What” Key Point #1: DNA Deoxyribonucleic Acid The blueprint is the plan for the house. It tells what the house will have and where everything will go. Just like a blueprint, our DNA will tell our bodies what traits of characteristics it will have. Take 20 seconds to silently think about the answer to this question. When I say time, discuss your answer with the members of your table. I will be calling on groups so be ready to answer.

DNA History Early in the 1800’s, Darwin proposed there was a similarity between organisms, but he did not know what that was. We now know that is DNA! Gregor Mendel in 1859 observed characteristics of pea plants and wanted to know why a red flower and a white flower produced a pink flower. DNA was discovered in 1869 by a Swiss doctor.

DNA History Up until the 1950’s, scientists were not sure how genetic material was passed from parents to offspring. Some scientists thought it was proteins that were passed on An experiment in 1952 confirmed that DNA is passed on and DNA carries traits.

“WHO” Key Point #2: Scientists, Watson, Crick, and Franklin discovered the STRUCTURE of DNA. Watson and Crick were awarded the Nobel prize in 1962.

“When” Key Point #3: The structure of DNA was discovered in 1953. How? They used the technique of x-ray crystallography to uncover the structure of DNA.

“Why” Key Point #4: DNA is our ________ information. Carries our traits (genotypes-> phenotypes) Like hair color, eye color, height, and diseases GENETIC Ribosomes Proteins are important because they make up the structures and enzymes needed in the cells and our bodies. The proteins gives up the trait we have.

“DNA is the blueprint of the cell.” Explain this quote “DNA is the blueprint of the cell.” Like a blueprint for a house, DNA is the information that tells our body what traits we will have. For example: eye color and hair color Turn and talk with a classmate for three minutes then hear from a few students.

Key Point #5: DNA is a double helix structure

What are all the parts that make up this?

Nucleotides Key Point #6: DNA is made of nucleotides- 1 sugar 1 phosphate 1 base The building blocks of DNA are nucleotides. Every nucleotide is made of 3 parts- sugar, phosphate, and base. What does the term “deoxyribose” mean?

The bases Every nucleotide has 1 base, but there are 4 to choose from- Key Point #7: Thymine (T) Cytosine (C) Adenine (A) Guanine (G)

Phosphate Sugar Bases

Where is DNA stored? Key Point #8: Since DNA is SOOO important and give us our traits, we store it in a very special place. Key Point #8: DNA is stored in the organelle, the nucleus. WHY? The DNA NEVER leaves the nucleus.

Objective revisited We will be able to justify the selection of data from historical investigations that support the claim that DNA is the source of heritable information. Did we meet our objective? What is the history behind DNA? What is the function of DNA? Tomorrow we will visit the structure of DNA and discuss how the structure is related to the function.

Work Time Directions: Read page 184-185 in your textbook and outline these paragraphs in your notes. This is homework if you do not finish and will be checked tomorrow as a quiz grade. With your outline, define the following terms: Monomer, polymer, nucleotide, gene, chromosome, and covalent bonds Page 47 in your notebook Noise: 0 (silent) Time: till the end of class