How do external factors change an organism's genes to affect their offspring? Lecture 2: Environmental factors, such as radiation, can cause mutations.

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Presentation transcript:

How do external factors change an organism's genes to affect their offspring? Lecture 2: Environmental factors, such as radiation, can cause mutations in DNA. Radiation can cause changes in the operon or section of genes. This may cause frame-shift and point mutations. The repressor that binds to the operator may be mutated to express the mutated genes. Terms of Use: Mutation, Frameshift mutation, Point Mutation Operator, Repressor, Operon

Concept Map Mutation Frame-shift Mutation Point Mutation Operon From radiation Frame-shift Mutation Point Mutation Miss pairing of one base Insertion and deletion of bases Operon Operator A series of genes Repressor Repressor binds and stops protein production Turns Genes OFF

How did this Happen?

Effects of Radiation on DNA

Gene Regulation

Drawing and Labels

Primary Investigation Write the question and answer in a complete sentences Q1. How does radiation affect DNA? A1. Q2. How do shifts in the DNA change the proteins made? A2. Q3. How can a mutation in the repressor cause uncontrolled expression of the operon? A3.

Exit Slip How are mutations caused by environmental factors? Write the question and answer in a complete sentence How are mutations caused by environmental factors? Claim (How): Evidence (Why): Example (What):

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