Download 1 Unit 9: Modern Genetics Advance Organizer Topic: DNA, RNA

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Unit 9: Modern Genetics
Advance Organizer
Topic: DNA, RNA,& Protein Synthesis
1. Objectives
a. Summarize the relationship between genes & DNA, the events of DNA replication, and the
events of protein synthesis.
b. Describe and model the structure of the DNA and RNA molecules and the general structure
of a protein.
c. Summarize the events of DNA replication, transcription, and translation.
d. Differentiate between DNA and RNA in terms of structure & function.
e. Distinguish between the three types of RNA.
f. Differentiate between types of mutations.
g. Identify mutations in a string of DNA or RNA and describe the consequences of that
mutation when forming proteins.
2. Key Vocabulary (20)
nucleotide
base pairing
chromatin
histone
replication
DNA polymerase
messenger RNA
ribosomal RNA
transfer RNA
transcription
RNA polymerase
intron
exon
codon
translation
anticodon
mutation
point mutation
frameshift mutation
hox gene
3. Essential Questions
a. How does DNA copy itself?
b. How are proteins formed?
c. What are mutations, how are they caused, and what are the consequences of mutated DNA?
4. Assessments & Schedule
*Miss Taylor reserves the right to change as needed*
Read 12.2-12.4, Define Key Vocabulary, Answer Key Concept Questions for 12.2-12.4
Due January 27
DNA Replication Worksheet
Due January 28
A Taste of Genetics Lab or Alternate
January 28
Codon Bingo
February 1
Protein Synthesis Worksheet
Due February 2
Mutations Worksheet
Due February 4
Monstrous Mutations Lab or Alternate
February 5
Chapter 12 Packet
Due February 5
Unit 9 Study Guide & Review
Due February 8
Unit 9 Test
February 9
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Notes- DNA
Structure
-
DNA aka __________________________ is made of ______________ wrapped around
proteins called ________________ which allow DNA to coil in the nucleus.
- __________________________________ first discovered the structure of DNA.
- DNA looks like a _________-________ or twisted ladder under a microscope.
- DNA is _____________ - _______________ and found in the ________________.
- Contains ______________ information and instructions for making ___________ which
control cell activities.
- Made of monomers called ______________ (monomers of nucleic acids).
Draw a model of DNA:
Function
-
DNA copies itself through ________________ (_______-_________________).
___________________________ is the protein that moves along the DNA strand during
replication that ensures the code copies correctly.
DNA is made of 4 ____________________ bases. These bases pair together to create a
code.
1. ______________ include ___________(__) and _____________(___).
These
have a ___________-____________ structure.
2. ______________ include____________ (___) and __________ (___).
These have a ___________-____________ structure.
When DNA replicates (copies), adenine (A) pairs with _____________(___) and cytosine
(C) pairs with _____________(___).
For example:
Original:
Complementary:
A A C T G G T A C T T A
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RNA & Protein Synthesis
Structure
●
RNA aka ____________________ is found in the _____________ and makes
______________.
● RNA is ______________-stranded.
● RNA contains the base ________________(___) instead of ____________(___).
● In RNA _______=_______, ________=_________, ________=_________ and
________=_________. (The RNA strand CANNOT contain any “T”s.)
Types
●
__________ or messenger RNA, enters the nucleus and copies the part of DNA needed,
then carries that copy to the ribosome.
a. _______________ - part of DNA code that DOES NOT code for protein
b. _______________ - part of DNA code that DOES code for protein
c. _______________ - protein that “reads” the code so mRNA can match bases and
make a copy
●
__________ or transfer RNA, takes the code from mRNA and translates it into a strand of
amino acids to form a polypeptide (string of amino acids) that make a protein. There are
20 possible amino acids!
a. _______________ - 3-letter “word” that codes for an amino acid –
found in mRNA strand
b. _______________ - matching 3-letter “word” assembled by tRNA
to complete the protein
●
__________ or ribosomal RNA, makes up ribosomes
Function
●
__________________ - mRNA copies the code it needs from DNA and takes it to the
ribosome (transcribe = copy)
● __________________ - tRNA takes the code from mRNA by turning it into codons,
reading them, and assembling the correct amino acids into a chain – Completes the
protein by matching anticodons to codons in mRNA. (translate=make something new)
**Amino Acid Wheel**
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For example:
Original DNA:
mRNA:
anticodons:
Amino Acid Sequence:
Original DNA:
mRNA:
anticodons:
Amino Acid Sequence:
Original DNA:
mRNA:
anticodons:
Amino Acid Sequence:
_______________________________________________
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_______________________________________________
_______________________________________________
_______________________________________________
_______________________________________________
_______________________________________________
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_______________________________________________
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_______________________________________________
_______________________________________________
What happens if you get a “Stop” codon?__________________________
Amino Acid Wheel
Helpful Hints
1. Work from the inside to the outside.
2. Make sure you read the codon NOT the
anti-codon.
3. If you see a "T" in your codon, go back
and check your mRNA strand.
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Mutations
Gene Mutations
_________________________ - caused by a ________________ of one base for another
affects only one amino acid
Ex.
*Health effects:
________________________ - caused by an ________________ or _______________
“shifts” the way the code is read and affects multiple codons
Ex.
*Health effects:
Chromosomal Mutations
________________________ - Gene(s) are repeated
Ex.
*Health effects:
________________________ - Gene(s) are omitted
Ex.
*Health effects:
_________________________ - Genes are mixed up
Ex.
* Health effects:
_________________________ - Gene(s) break off from one part of a chromosome and attach to another
Ex.
*Health effects: