Science Bell Work Define DNA and add it to your vocab section in your notebook.

DNA (deoxyribonucleic acid)

What we are learning today… SPI 0707.4.3 – Describe the relationship among genes, chromosomes, and inherited traits. When we are done with today’s lesson, you should be able to… Identify the parts of a DNA molecule and its structure. Understand that the chromosomes are composed of DNA strand and proteins. Why is it important you learn this? It is important because DNA helps determine nearly everything your body does. You need to have a basic understanding of DNA before we begin learning how to use a Punnett square to determine possible genetic combinations passed from parents to offspring. (SPI 0707.4.4)

Why was the alphabet the first thing you learned in Kindergarten? Letters are a code that you need to know before you learn to read. A cell also uses a code that is stored in its hereditary material. The code is called deoxyribonucleic acid, DNA. It contains information for an organism’s growth and function. When a cell divides, the DNA code is copied and passed to the new cells. New cells receive the same coded information that was in the original cell. Every cell that has ever been formed in your body or in any other organism contains DNA.

DNA is part of the chromosomes found in a cell’s nucleus.

I’m going to twist a piece of yarn. Now twist, twist, twist, twist, twist….twiiiiisssst. What starts to happen to the yarn? It begins to tighten and wrap around itself. Just like DNA wrapped around proteins...

Phosphate Sugar

Here’s an easy way to remember which nitrogen bases pair up…. C G ountry irls T A alk lot OR AT G C ibson ounty

Guidelines when Working in Groups Have respect for each other. - Respect each other’s ideas - Respect the other group members - Don’t interrupt each other - Everyone’s opinion should count - Be honest with each other All group members should do an equal amount of work. - Everyone should share the responsibility of the tasks - Don’t take over and don’t let others take over Your group should have a common understanding of goals that need to be achieved. - Help each other to understand all concepts Be open to compromise. - Be willing to cooperate with others on their ideas - Keep an open mind - Vote on disagreements Effective communication. - Make sure everyone is able to be vocal about their ideas and problems - Give ideas no matter how “off” you may think they are - Listen effectively - Don’t be critical Time management. - Attend and arrive on time to all group meetings - Be flexible about meeting times - Keep on task (limit talk about non-related events) Be happy in the group you are in.

Find your group…QUICKLY…QUIETLY Group 1 Tyler, Autumn, Chasity, Logan Group 2 Bri, Aiden, Christian, Victoria Group 3 Kate, William B., Jenny, Chad Group 4 Haley, Takayah, Sharri, Breanna T., Rebecca Group 5 Jessica, Hunter P., Joshua, Gracie Group 6 Kaleah, Nash, William J., Kloie Group 7 Anna, Cherika, Hunter A., Madison

Build a DNA molecule using… Gummy bears Twizzlers Toothpicks DO NOT EAT THE PROJECT PIECES PLEASE….SERIOUSLY! WHAT KIND OF BACTERIA ARE ON THOSE THINGS! I MEAN I DID WASH MY HANDS WHEN I PUT THE PIECES IN THERE…. OR DID I?

When you finish building your DNA. Individually answer the following exit ticket questions on a separate sheet of paper with your name at the top. What are the four nitrogen bases in DNA? Give the corresponding bases for the following code: GGTACTC What did you learn during your group activity?

In closing…

Homework / Practice