Presentation is loading. Please wait.

Presentation is loading. Please wait.

Mutations.

Published byGerard Webb Modified over 6 years ago

Similar presentations

Presentation on theme: "Mutations."— Presentation transcript:

1 Mutations

2 Mutations A section of DNA on a chromosome that directs the making of a specific protein is called a gene Genes control the traits inherited by an organism If a change occurs in a gene or chromosome, a trait of that organism may be changed Any permanent change in a gene or a chromosome of a cell is called a mutation

3 Gene mutations Point mutation- A change in a single base pair in DNA
Causes a change in a single amino acid in the protein for which the gene codes Example: Normal mRNA: AUG-AAG-UUU-GGC-GCA-UUG-UAA Point Mutation mRNA: AUG-AAG-UUU-AGC-GCA-UUG-UAA G was replaced by A

4 Gene Mutations continued
Frameshift mutation- when a single nitrogen base is added to or deleted from a DNA strand Addition or deletion- of a base causes the sequence of amino acids on the strand to change= formation of different protein

5 Chromosomal mutations
Occur when parts of chromosomes are broken off and lost during mitosis and meiosis. Also occur when chromosomes break and rejoin incorrectly. Deletion- when part of a chromosome is left out Insertion- when a part of a chromatid breaks off and attaches to its sister chromatid Inversion- takes place when a part of a chromosome breaks out and is reinserted backwards Translocation- occurs when a part of a chromosome breaks off and is added to a different chromosome

6 Examples of Chromosomal Mutations
ABCDE FGH ABCE FGH ABCDE FGH ABCBCDE FGH ABCDE FGH ADCBE FGH ABCDE FGH WXABCDE FGH Deletion Insertion Inversion Translocation WXY Z Y Z

7 Questions?

Download ppt "Mutations."

Similar presentations

Mutations A mutation is a permanent change in the DNA or RNA sequence of a gene. There are two ways in which DNA can become mutated: 1.Mutations can be.

Mutations A mutation is a permanent change in the DNA or RNA sequence of a gene. There are two ways in which DNA can become mutated: 1.Mutations can be.
DNA and GENES.

DNA and GENES.
Genes and mutations. What are genes? A molecular unit of heredity The name for stretches of DNA and RNA that code for a specific protein (which has a.

Genes and mutations. What are genes? A molecular unit of heredity The name for stretches of DNA and RNA that code for a specific protein (which has a.
Mutations and Gel Electrophoresis. Mutations “Changes in the DNA sequence that are inherited” Can have a negative consequence, no consequence, or a positive.

Mutations and Gel Electrophoresis. Mutations “Changes in the DNA sequence that are inherited” Can have a negative consequence, no consequence, or a positive.
Chromosomes/DNA Mutations

Chromosomes/DNA Mutations
Definition : Any change in the nucleotide sequence of DNA.

Definition : Any change in the nucleotide sequence of DNA.
 Mutations are a result in a change in DNA sequence › A protein with a different AA sequence could be produced. › Germ Cell - If mutations occur in sex.

 Mutations are a result in a change in DNA sequence › A protein with a different AA sequence could be produced. › Germ Cell - If mutations occur in sex.
Genetic Mutations Increasing Genetic Diversity May 4, 2010.

Genetic Mutations Increasing Genetic Diversity May 4, 2010.
TTGACATACCCGTAAT What would the complementary strand of this DNA molecule read? AACTGTATGGGCATTA.

TTGACATACCCGTAAT What would the complementary strand of this DNA molecule read? AACTGTATGGGCATTA.
Section 11.3 Genetic Changes.

Section 11.3 Genetic Changes.
What ’ s the Purpose of All This DNA Stuff? *Sequence of nitrogen bases along the DNA strand (genes) code for an amino acid sequence (which make up proteins)

What ’ s the Purpose of All This DNA Stuff? *Sequence of nitrogen bases along the DNA strand (genes) code for an amino acid sequence (which make up proteins)
Mutations that happen during Transcription and Translation

Mutations that happen during Transcription and Translation
Slide 1 of 24 Copyright Pearson Prentice Hall 12-4 Mutations 12–4 Mutations.

Slide 1 of 24 Copyright Pearson Prentice Hall 12-4 Mutations 12–4 Mutations.
Chromosomes, Genes, and Mutations

Chromosomes, Genes, and Mutations
 During replication (in DNA), an error may be made that causes changes in the mRNA and proteins made from that part of the DNA  These errors or changes.

 During replication (in DNA), an error may be made that causes changes in the mRNA and proteins made from that part of the DNA  These errors or changes.
Slide 1 of 24 VIII MUTATIONS. 12-4 Mutations Types of Mutations:

Slide 1 of 24 VIII MUTATIONS Mutations Types of Mutations:
Chromosomes/DNA Mutations. Chromosome Mutation Mutations are permanent gene or chromosome changes that will be passed on to offspring if they occur in.

Chromosomes/DNA Mutations. Chromosome Mutation Mutations are permanent gene or chromosome changes that will be passed on to offspring if they occur in.
Question of the Day 4-27 1. During translation, the ____ moves along the mRNA and builds the amino acid chain with the help of ____ molecules.

Question of the Day During translation, the ____ moves along the mRNA and builds the amino acid chain with the help of ____ molecules.
A change in the nucleotide sequence of DNA Ultimate source of genetic diversity Gene vs. Chromosome.

A change in the nucleotide sequence of DNA Ultimate source of genetic diversity Gene vs. Chromosome.
Objective: To discuss different mutations 12.4. Gene mutation Mutations: change in genetic material Gene Mutation: change is on one or a few nucleotides.

Objective: To discuss different mutations Gene mutation Mutations: change in genetic material Gene Mutation: change is on one or a few nucleotides.

Similar presentations

Ads by Google