Polytene PowerPoint PPT Presentations

Polytene chromosomes. Irradiate a Drosophila line. Select different deletion lines ... a salivary gland chromosome of Drosophila are shown in the accompanying figure, ...

Seen in the nucleus during interphase ... EM shows chromatin to be linear arrays of spherical particles 'beads on a string' = nucleosomes ...

whether a Deletion Uncovers a Particular Gene. st/st. scarlet eye color. Del/st ... scarlet eye color. Deletion 'uncovers' scarlet. Pericentric Inversion (peri ...

Changes in the patterns of puffing occur as a direct consequence of changes in the concentration of the insect's ... observed in permanent tissue culture cell ...

Drosophila Imaginal Discs and Salivary Gland Polytene Chromosomes Drosophila salivary gland squash prep stained with aceto-orcein showing polytene chromosomes

Variegated position effect: Effects of inversions. 1. 'Suppression' ... 3. Position effects ('variegated') There apparently was a pericentric inversion in the ...

Figure 3. Polytene chromosome map of Anopheles gambiae. Constructed by Dr. Anton Cornel, UC Davis. ...

Introduction to Chromosomes Eukaryotic Chromosomes a. Drosophila polytene chromosomes. An Introduction to Genetic Analysis, Griffiths et al., Fig. 8-4.

Drosophila polytene chromosomes. GENETIC ENGINEERING. Gene products. Gene therapy ... Review materials in lab for final exam. Labs will not be open to students ...

... the major group of genes containing homeoboxes in Drosophila; engrailed ... the insulator scs is localized at interbands in Drosophila polytene chromosomes. ...

Structural genes code for actual proteins/enzymes ... Androgen insensitivity. Chromosomal puffs. Ecdysone. Polytene chromosomes. RNA Processing Level ...

b. Levene - 1910 Chromosomes consist of DNA and proteins. ... seen in a polytene chromosome' VII. DNA and Genome Structure ... typically a circular chromosome ...

... the appearance of the male X chromosome it is no longer diffuse and puffed. ... Localization in D. busckii polytene chromosomes. DAPI (A) and anti-POF (B) ...

Heat Stress (or Heat Shock) Response. Discovered in Drosophila, polytene chromosome puffing ... A sub-lethal heat shock allows organisms to survive a lethal treatment. ...

transcription unit. exon. exon. Promoter ... Enhancers can be tens of kb distant from the gene ... Drosophila polytene chromosome bands are insulator units. ...

The author does not guarantee accuracy and will not update the lectures, which ... melanogaster, probably by a parasitic mite that sucks cytoplasm from fly eggs. ...

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Chromosome Mutation

... LTR elements, the reverse transcription is primed by a 3' hydroxyl exposed at a ... and TART is hypothesized to be primed by the 3' hydroxyl on the extreme ...

Title: (nucleus) (chromosome) Author: a Last modified by: zeng xianlu Created Date: 8/7/2000 1:52:57 AM

Inversions and loss of recombinant gametes. Robertsonian translocation 13/14 ... Down syndrome, 21 trisomy. Incidence of Down syndrome and maternal age ...

Chapter 16 - Variations in Chromosome Structure and Function: Chromosome structure Deletion, duplication, inversion, translocation Focus of Cytogenetics

The Eukaryotic Chromosome: An Organelle for Packaging and Managing DNA

The Drosophila SWI/SNF ATPase Brahma localizes to active regions of the genome ... 'Imitation switch' isolated first in Drosophila by homology with SWI/SNF ...

Organization of DNA Within a Cell. from Lodish et al. ... Histones contain flexible termini. that extend from the globular. structure of the nucleosome ...

Positive control - an active regulatory protein enhances the rate. Of transcription ... enhancer sequences, and transcription factors. Fig. 19.7 ...

The heterochromatic properties and physical organization of chromosome 4 in Drosophila R. Hodgetts, L. Podemski, N. Aippersbach, L. Howard and J. Locke

Chromatin Structure. Decondensation of the 30 nm fiber. produces beads on a string. from Lodish et al., Molecular Cell Biology, 5th ed. Fig 10-19. The Nature of ...

Demonstration of differential gene expression has been done through a variety of ... Drosophila, Xenopus, zebrafish, C. elegans, cultured cells (ES cells mouse) ...

PowerLecture: Chapter 15 Controls over Genes

CHAPTER 10 The Nature of the Gene and the Genome Sequencing Genomes: The Footprints of Biological Evolution (5) Structural Variation Segments of the genome can change ...

the rest is transcriptionally inactive/silenced (but can be activated in certain ... Group 2 (Fenton - How): de Napoles et al, 2004, Dev. Cell 7: 663-676 ...

Antibodies, Chromatin Preps, ChIP-Mapping, Validation. Which Proteins ? ... Nuclear lamina and pores. Nup 153. Lamin C. Lamin B receptor. 3D architecture. More details ...

is called a paracentric inversion. Absence of recombination within an inversion ... an inversion loop of a paracentric inversion creates dicentric and acentric ...

Dicentric chromosomes contain two centromeres = abnormal separation ... abortions, which in turn. show chromosomal. abnormalities in 50%. Chromosome Deletions ...

Individual chromosomes can be seen only during mitosis. During interphase, the general mass of chromatin is in the ... the silent cassettes in yeast mating type ...

????????????????????????????????? ????????????????????? ??????? ... J.B. Gurdon ????? Afarican clawed toad ???????????????????????? ????????????????????????? ...

Drosophila as a model

Chapters 3 and 7 multiple choice quizzes (Due Monday 9/24 at midnight) Bioinformatics assignment (Handout) details later in class (Due Thursday 9/27 IN ...

... and plexus on the second, and heterozygous for Stubble on the third. white and plexus are ... px: plexus (wing veins have. spurs and star patterns) ...

4 chrms where chrm #1 is the X chrm, and chrms #2-4 are autosomes ... Metamorphosis: Disintegration of larval tissues and their replacement through ...

Fatchiyah, Ph.D. Lab. Molecular Biology Brawijaya University * fatchiyah, JB UB * Structure of Chromosome - NORs electron micrograph of interphase cell from bat ...

The nematode Caenorhabditis elegans. The fruit fly Drosophila melanogaster ... Model 4 : THE NEMATODE WORM, Caenorhabditis elegans. CHAPTER 15 The Genetic Code ...

1902 Walter Sutton, Theodore Boveri and others noted parallels between behavior ... Most plants and some animals are NOT dioecious organisms with separate sexes. ...

... that are responsible for DNA replication, expression and also cell division. ... In yeast, DNA sequences containing origins of replication are isolated by their ...

... (pericentric inversion) : ...

30 nm chromatin fiber or solenoid: created by coiled 11 nm fiber- interphase ... NO gene transcription in solenoid. Gene transcription possible ...

... Epigenetic Modifications Within an Arabidopsis Chromosome Heterochromatin correlates with epigenetic marks DNA ... Mechanisms for Repression Mediated ...

Sexual processes in ciliates have been known since they were discovered by the ... Ehrenberg (1838) suggested immortality for the ciliates, and Maupas (1889) found ...

?????????????????????????????????????????????????. Nucleic acid. ?? ... House mouse ( Mus musculus) 40. Round worm (Ascaris sp.) 2. ?????????????. 40 ...

Introduction linkage analysis, Genetic markers, mapping functions Lecture 3 Background Readings: Chapter 5 & 6 (190-193) of An introduction to Genetics, Griffiths et ...

mtlrRNA rescue UV-irradation. Vasa: DEAD-box RNA helicase translational regulator ... Activates dachshund between Dll and hth. Butterfly wing pattern. Eyespot ...

Four stages: Initiation, Elongation, Termination, Post-transcriptional modification ... Dissociation is somehow coupled to ATP hydrolysis. Comparison with Eukaryotes ...

Squamous Cell Carcinoma (2nd most common, pink, firm to touch) Middle ... Eukaryotes rarely use more than 5-10% of their genes at any given time. ...

The Eukaryotic Chromosome: An Organelle for Packaging and Managing DNA How chromosomal packaging influences gene activity Decompaction precedes gene expression ...

Small fraction of genes are used in each cell but they all have the same genes ... put adult nuclei in an egg cell and can get tadpole development. clone ...