'Wee rat' diaporamas de présentation

DNA Mutations

DNA Mutations. Chapter 12.4. Mutation. Mutation : Any change in a gene is a mutation. Substances that cause a mutation are called mutagens. Mutations can also happen spontaneously. Point Mutation. A change in one nucleotide

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Changes in DNA

Changes in DNA. Analogy. We will be using a sentence as an analogy to represent a strand of DNA. Our sentence is: The fat cat ate the wee rat. If this sentence represents a strand of DNA, what does each word represent ? (CODON) What does each letter represent ? (NUCLEOTIDE).

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Mutations

Mutations. A Mutation is a change in genetic material. There are 2 types of mutations Gene mutations Produce a change in a single gene Chromosomal mutations Produce a change in a whole chromosome. Gene Mutations. Point mutation Mutations involving one or only a few nucleotides.

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Mutations youtube/watch?v=kp0esidDr-c&safe=active

Mutations http://www.youtube.com/watch?v=kp0esidDr-c&safe=active. Can also have trisomy and monosomy. Gene mutation. Gene mutations: point vs. frameshift. Chromosomal mutations.

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Mutations

Mutations. The fat cat ate the wee rat ???. Point Mutation. = a simple change in one base of the gene sequence. This is equivalent to changing one letter in a sentence, EXAMPLE: where we change the 'c' in cat to an 'h': Original - The fat cat ate the wee rat.

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