Bell Ringer (On a sheet of paper) 1. DNA is found in a cell’s membrane. 2. Identical twins have different DNA. 3. Genes are sections of DNA that code for certain traits 4. Chromosomes are long strands of DNA. 5. DNA is Single -stranded 6. Clones contain the same genetic material 7. Nearly every cell in your body has a complete set of DNA. Copy the 7 statements below. Then, identify whether the statement is true or false.
Bell Ringer (On a sheet of paper). Copy the 7 statements below. Then, identify whether the statement is true or false. . 1. DNA is found in a cell’s membrane. 2. Identical twins have different DNA. 3. Genes are sections of DNA that code for certain traits - PowerPoint PPT Presentation
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Bell Ringer (On a sheet of paper)
1. DNA is found in a cell’s membrane.2. Identical twins have different DNA.3. Genes are sections of DNA that code for certain traits4. Chromosomes are long strands of DNA.5. DNA is Single-stranded6. Clones contain the same genetic material7. Nearly every cell in your body has a complete set of DNA.
Copy the 7 statements below. Then, identify whether the statement is true or false.
Brain Pop Video Clip
• While watching the video clip, look back at the 7 true or false questions from the bell ringer to correct your answers.
1.What does DNA look like?2.What is DNA Composed of?3.Where can you find DNA?
Learning Target
I can create a model of DNA to describe the composition of DNA.
Edible DNA Model
Each group (of 2) will have• 2 pieces of twizzlers• 12 toothpicks• 9 pink marshmallows• 9 green marshmallows• 9 yellow marshmallows• 9 orange marshmallows• 5 paperclips
Edible DNA Model
There are 1 set of instructions per group as well as questions. Please read and follow the written instructions and answer all questions. (Everyone will answer all questions)
Questions
1. When constructing the DNA molecule, explain what you notice about the orientation of the two strands?
2. In DNA, thymine is complementary to (or pairs with) _________________________ ; cytosine is complementary to _________________________.
Questions
3. What DNA strand would bond oppositeS----P----S----P----S----P----S----P----S----P----ST G G A C C
4. Explain why DNA is known as “blueprint of all living organisms.”
Questions
5. Describe the smallest unit of DNA.
6. Describe the shape of the DNA molecule.
7. Assume that a 100-base pair DNA double helix contains 45 cytosines. How many adenines are there?
Please copy the sentence and then answer.1. According to base pairing rules with DNA "A" bonds‐ only to ______.
2. According to base pairing rules with DNA “G" bonds ‐ only to ______.
3. A segment of DNA has one strand with the following sequence of bases:
AGCGCATAGCAA
What would the complimentary strand of DNA would be?
MutationsWould a mutation make you a superhero?• In the comic books, a mutation
can give a person superpowers. Do you think this really happens? In real life, a mutation can be beneficial, or it can harm an organism. For example, beneficial mutations lead to evolution, and harmful mutations can lead to diseases like cancer. A mutation, however, is not going to turn you into a superhero!
Brain Pop Video Clip
Before watching the video clip, fold your construction paper in hotdog style and then into 1/8ths. (fold it in hamburger style 3 times)
• Can be spontaneous or caused by mutagens• ex: Chemicals, high temperatures, UV light,
radiation
• Can change the genetic code, and be replicated when forming new body cells.
• In sex cells, can be passed on to offspring.
• Mutations can be neutral, beneficial, or harmful• ex: Blue eyes – a mutation that occurred 6-
10,000 years ago, can be traced back to one ancestor
• what kind of mutation is that?
Different Types of Mutation
• On the front tab, you will write down the name of the mutation.
• Inside, you will write down the definition for that specific mutation.
• On the other side of the tab (inside), you will write down the example.
Different Types of Mutation• On the front tab, you will write down
the name of the mutation.• Inside, you will write down the
definition for that specific mutation.• On the other side of the tab (inside),
you will write down the exmaple.
1. DeletionWhen a segment of DNA is lost, so there is a missing segment in the chromosome. These usually result in many genes missing from the chromosome.
THE DOG BIT THE CATDelete just one letter (T):
THE DOG BIT HEC ATIf a single base is deleted (called a point mutation), there can be huge effects on the organism because this may cause a frameshift mutation.
2. DuplicationWhen a segment of DNA is repeated, creating a longer chromosome. These usually result in multiple copies of genes in the chromosome.
THE DOG BIT THE CATRepeat one letter:
THE DOOG BIT THE CAT
3. Inversion When a segment of DNA is flipped and then reattached to the same chromosome.
THE DOG BIT THE CATTwo letters from the word switch places
THE GOD BIT THE CAT
4. InsertionWhen a segment of DNA from one chromosome is added to another, unrelated chromosome.
THE DOG BIT THE CATAdd just one letter (E):
THE DOE GBI TTH ECA T
5. TranslocationWhen two segments from different chromosomes change positions.
THE DOG BIT THE CAT
The letters from different words switch places THE DOT BIG THE CAT
6. SubstitutionA substitution is a mutation that
exchanges onebase for another (i.e., a change in a single “chemical letter” such
as switching an A to a G) THE DOG BIT THE CAT
Replace just one letter:THE DOG BIT THE CAR
3,2,1 Exit!
1. Name 3 types of mutations and define each one.2. Describe two causes of mutation.3. Explain how a mutation can be a benefit to an organism. Support your answer with a specific example.