PPT-Mutations (Ch. 17) Mutations

Point mutations single base change silent mutation no amino acid change redundancy in code missense change amino acid Changes the final protien nonsense change to stop codon Stopping prematurely . Types . of Mutations | . Effects . of . Mutations. Learning Objectives. Identify different changes to DNA within both genes and chromosomes. Evaluate effects of changes to DNA on proteins produced and organisms’ overall survival. What Are Mutations?. Mutation: . Changes . in the nucleotide sequence of . DNA. Mutagen: . A physical or chemical agent that changes DNA. Mutation May . occur . in:. somatic cells (body cells): . will not be . Mutations. Any unpredictable change in the structure or amount of DNA of an organism is called a . mutation. . . Most . mutations occur in . somatic (body) cells. and are not passed from one generation to the next. . or. How a perfectly good system can go wrong go wrong go wrong. There are 2 types of mutations. 1)Chromosomal rearrangements. . There are too many or too few chromosomes. (nondisjunction and polyploidy). Mutations are changes in the genetic material. . Mutations may be genetic mutations or chromosomal mutations.. Genetic Mutations occur in the “code” on DNA or mRNA. Mistakes in . copying the DNA :. Mutation. Permanent change in the genetic material of an organism. All mutations in gametes are inheritable because they are copied during DNA replication. Somatic cell mutations occur in body cells. P Ferguson, L . Quek. , M . Metzner. , I Ahmed, C Garnett, S Jeffries, K . Piechocki. , R Danby, M . Raghavan. , A . Peniket. , M Griffiths, A Bacon, J Ward, K Wheatley, P Vyas, C Craddock. Introduction. >2500 cancer genomes: Overall . functional . impact. Slides freely . downloadable . from . Lectures.GersteinLab.org. . & “tweetable” . (via . @. markgerstein. ). . See last slide . for more info.. What happens if there is a mistake (. mutation. ). in the DNA code?. Possibly proteins won’t be made or are made improperly.. If the mutations occur in the gametes, the offspring’s DNA will be affected positively, negatively, or neutrally.. Polypeptides made up of amino acids. Proteins are polypeptides, numerous amino acids. First Recall Proteins------. **Peptide Bond between amino acids. **Notice the “R” group. It’s a group of molecules that determines the amino acid.. http://io9.gizmodo.com/10-unusual-genetic-mutations-in-humans-470843733. Unharmful. Mutations. Mila . Kunis. has complete . heterochromia. . Kate Bosworth has . sectoral. . heterochromia. . Angelina Jolie has central . Given a mutation, identify its type. Predict how a mutation will affect a protein.. Mutations. Changes in genetic material (DNA). 2 main types of mutations. Point mutation- change in one or a few nucleotides (letters). KEY CONCEPT:. . Mutations. are changes in genetic material.. VOCABULARY:. Mutation, point mutation, . frameshift. mutation, polyploidy. Mutations – extension from gene expression. . Changes in genotype. Science. Learning intention. To understand the different types of mutations. . You will need. A pen and a piece of paper or a laptop to record your answers. . You may need the internet to search for answers. .