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What is the product of transcription? What is the product of translation?. What does the Central D ogma state?. DNA goes through transcription to make RNA RNA goes through translation to make protein. What is a mutation?. A change in the genetic code. Mutations. Point mutaions. - PowerPoint PPT Presentation
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• What is the product of transcription?
• What is the product of translation?
• What does the Central Dogma state?
• DNA goes through transcription to make RNA• RNA goes through translation to make protein
What is a mutation?
• A change in the genetic code.
Mutations
Point mutaions• Involve changes in one or a
few nucleotides
• Generally occur during replication
Chromosomal mutations• Involve changes in the
number or structure of chromosome
Types of mutations
Point Mutations• Substitution -missense -silent -nonsense
• Insertion (frameshift)
• Deletion(frameshift)
Chromosomal Mutations• Deletion
• Duplication
• Inversion
• Translocation
Point Mutations/Substitions
Point Mutations/Frameshift
Deletion:
Insertion:
http://science.jburroughs.org/mbahe/BioA/starranimations/chapter9/videos_animations/frameshift.htmlFrameshift mutation
Chromosomal mutations
Mutagens
• Chemical or physical agents in the environment that cause mutations
Cells can sometimes repair the damage, but if not, the sequence remains changed permanently.
Harmful Mutations
• Those that dramatically change protein structure or gene activity
• May cause genetic disorders – Sickle Cell disease
• May cause cancer
Beneficial Mutations
• Mutations have helped insects resist chemical pesticides
• Mutations in humans that increase bone strength and density
• In plants – polyploidy (an extra set of chromosomes) make plants stronger and larger
• What is the difference between point and chromosomal mutations?
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