Polytene Chromosomes of D. melanogaster Electron Micrograph of a Single Chromatid of a Mitotic Chromosome.

Slides:



Advertisements
Similar presentations
Chromosomes and gene regulation DNA is just information - a blueprint No use unless you know the rules for using the information DNA is organised (in chromosomes)
Advertisements

The length of DNA in one chromosome
Section D: Chromosome StructureYang Xu, College of Life Sciences Section D Prokaryotic and Eukaryotic Chromosome Structure D1 Prokaryotic Chromosome Structure.
Chromatin Compaction. INTRODUCTION Difference between procaryotic and eucaryotic genome -E. Coli: 1X -Yeast genome: 4X -Fruit fly genome: 40X -Human genome:
Chromatin and chromosomes By Benjamin Lewin
DNA Organization in Chromosomes
Hereditary information is carried on Chromosomes that consist of both DNA and proteins Chromosomes in cells. (A) Two adjacent plant cells photographed.
Chromosomes and DNA Replication
The Molecular Basis of Inheritance.  Used bacteriophages (viruses that infect bacteria)  Only made up of DNA and protein  Used phosphorus to “tag”
Chapter 7 Molecular Organization of Chromosomes. The range of genome sizes in the animal & plant kingdoms.
13 and 15 September, 2006 Chapter 7 RNA and Chromosome Structure.
Protein and DNA interaction How to detect nucleosome position Xuefeng Zhu Department of Medical Biochemistry and Cell Biology
Problem: Measured linearly, the Escherichia coli genome (4.6 Mb) would be 1,000 times longer than the E. coli cell. The human genome (3.4 Gb) would be.
Section 2 Molecular and Morphological Structure of Chromosomal DNA
DNA and Chromosomes.
Packaging DNA T G A Histone C octomer Histone proteins 2 nm
Chapter 13 DNA Repair and Chromosome Structure. You Must Know DNA proofreading and packaging.
Organization of Chromosomes--Study Guide and Outline
Slide 1 of 21 Copyright Pearson Prentice Hall 12-2 Chromosomes and DNA Replication 12–2 Chromosomes and DNA Replication.
DNA Structure DNA consists of two molecules that are arranged into a ladder-like structure called a Double Helix. A molecule of DNA is made up of millions.
Structure of Chromatin
Cell and Molecular Biology
Genes, Genomes, and Chromosomes
Chapter 19 Organization and Control of Eukaryotic Genomes …Or How To Fit All of the Junk In the Trunk.
-Structure of DNA -Steps of replication -Difference between replication, transcription, & translation -How DNA is packaged into a chromosome CHAPTER 16.
Procaryotic chromosome (Escherichia coli) Nucleoid 1. High concentration of DNA (single closed circular, 4.6Mb) and the proteins associated with DNA. 2.
Copyright © 2009 Pearson Education, Inc. Chapter 12 DNA Organization in Chromosomes Copyright © 2009 Pearson Education, Inc.
The Organization of Cellular Genome Asmarinah Department of Medical Biology.
Genetics: Chromosome Organization. Chromosomes: Structures that contain the genetic material (DNA) Genome – complete set of genetic material in a particular.
DNA Organization, Replication, & Repair. Model for the structure of the nucleosome.
DNA, Chromosomes and DNA Replication
Chromosomes and chromatin
Salivary gland- polytene chromosomes Brain-diploid metaphase chromosomes Same Objective Lens: Why are the salivary gland chromosomes so much larger? Alyssa.
Chromatin Structure and Function BSCI 420. Chromatin is the complex of DNA and proteins that comprise eukaryotic chromosomes. 2 classes of chromatin proteins:
Nucleosome structure. Histones Most of the protein in eukaryotic chromatin consists of histones, of which there are five families, or classes: H2A, H2B,
Genes & Chromosomes Chromosomes - single large DNA molecule and its associated proteins, containing many genes; stores & transmits genetic info Gene -
Molecular Biology Eukaryotic Genome Structure. The human genome: nuclear and mitochondrial components.
Chromosome Oragnisation. What chromosome is made of? - chromosome is made of chromatin (nucleic acid and protein). - when in mitotic and meiotic stages.
12-2 Chromosomes and DNA Replication
Copyright Pearson Prentice Hall 12-2 Chromosomes and DNA Replication 12–2 Chromosomes and DNA Replication.
Relationship between Genotype and Phenotype
DNA and Chromosomes.
Gene Regulation, Part 2 Lecture 15 (cont.) Fall 2008.
Concept 16.3 A Chromosome consists of a DNA molecule packed together with proteins The bacterial chromosome is a double-stranded, circular DNA molecule.
The Structure of DNA and RNA
Chromosomes and DNA Replication
Chromosomes & DNA Replication
12.2 Chromosomes and DNA Replication
Chromosomes Chapter 8.
Example of a common SNP in dogs
DNA Organization in Chromosomes
DNA Structure Analysis Questions Answered
Section 8-2B: DNA Replication
Relationship between Genotype and Phenotype
RNA and Chromosome Structure
12.2 – Chromosomes and DNA Replication
Chromosome Organization
DNA Replication & Chromosomes
Chromosomes and DNA Replication
DNA Packaging.
THE ORGANIZATION AND CONTROL OF EUKARYOTIC GENOMES
Figure: Title: E. coli and its DNA Caption:
Genes & Chromosomes Compaction of DNA Supercoiling Relaxed.
DNA Repair and Chromosome Structure
12-2: Chromosomes and DNA Replication
12-2 Chromosomes and DNA Replication
Cell Division Mitosis.
MOLECULAR GENETICS.
EURKARYOTIC DNA IS TIGHTLY PACKED AND HIGHLY ORGANIZED
Relationship between Genotype and Phenotype
Presentation transcript:

Polytene Chromosomes of D. melanogaster

Electron Micrograph of a Single Chromatid of a Mitotic Chromosome

Electron Micrographs of Chromatin Strands Before and After Treatment

Micrococcal Nuclease Digestion of Chromatin

Sedimentation of Nucleosomes

Properties of Histones

Histones Forming the Nucleosome

Formation of Nucleosomes

Two Models for Packing Nucleosomes into 30nm Fiber

Hypothetical Model of Packaging DNA into Chromosomes

Histone Acetylation and DEACETYLATION

Histone Acetylation and Histone Structure

Number of Nucleotide Pairs Per Haploid Genome of Different Organisms

Integration: Renaturation of DNA is a Second Order Reaction

Reassociation Kinetics of Different DNAs

Reassociation Kinetics of Eukaryotic DNA

Sequence of Telomeric Ends of Different Organisms