GENE-Arun M. Chilke

PowerPoint Presentation: 

Gene Arun M. Chilke Department of Zoology Division of Toxicology and Biomonitoring Shree Shivaji Arts, Commerce and Science College, Rajura-442905 (India) E-mail: achilke.2011@rediffmail.com www.sscollegerajura.org

Introduction: 

Introduction Gene is a certain fragment of DNA (Deoxyribose nucleic acid). The DNA is a long polynuclotide chain present in all the prokaryotic and eukaryotic cell. Chromosome of the eukaryotic cell is complex structure. It consist of very long chain of DNA. Single eukaryotic chromosome contains several hundreds of gene. Simple double stranded DNA is a chromosome of prokaryotic cell and it carries hundreds of genes.

Properties of Gene: 

Properties of Gene Gene (certain DNA fragment) is able to replicate to prepare exact of it by semi- conservation mechanism.

PowerPoint Presentation: 

Gene undergo recombination to produce recombinant gene. Gene A. Gene B. Crossing Between Gene A and B Gene A and B With new combination Heteroduplex

Recon: 

Recon The region of gene where the nucleotides take part in the exchange of DNA segment are referred to as recon. It is a unit of recombination.

PowerPoint Presentation: 

Gene undergo mutation due to an abrupt change in nucleotide sequence of it. AGGCCGATCCAAGC TCCGGCTAGGTT CG AGGCCGATCCAAGC TC T GGCTAGGTT CG AGGCCGATCCAAGC TC C GGCTAGGTT CG AGACCGATCCAAGC TC T GGCTAGGTT CG Showing the site of mutation In the gene Nucleotide C (Cytosine) is changed to T (Thymine) As a result of replication one Strand conserved the nucleo- tide sequence of a gene And other strand is showing Change in both the strands. Original parental sequence Change in nucleotide Conserved sequence of nucleotides. Altered nucleotide Of both the strand.

Muton: 

Muton In the gene certain nucleotides undergo change which alter the expression of gene. They nuclotides are called the muton (the unit of mutation). AGGCCGATCCAAGC TCCGGCTAGGTT CG AGGCCGATCCAAGC TC T GGCTAGGTT CG AGGCCGATCCAAGC TC C GGCTAGGTT CG AGACCGATCCAAGC TC T GGCTAGGTT CG

Gene is able to repair to damage.: 

Gene is able to repair to damage. There are several chemical and physical and biological factors which damage the DNA that affects the primary structure of double helix. The specific DNA repair molecules bind at or near the site of damage, inducing other molecules to bind and form a complex that enables the actual repair to take place.

Gene is a Unit of Structure and Function.: 

Gene is a Unit of Structure and Function. Gene (Cistron) is a unit of structure. Gene directs the synthesis of protein through m-RNA. Thus the sequences of amino acids in the polypeptide chain is determine by sequences of nucleotides of a gene. The correct nucleotide sequence of a gene direct to produce the polypeptide (protein) with correct sequence of amino acids. Many of proteins performs variety of functions. Their native structure enable it to perform its respective function and it the structure of native protein change then the protein fails to perform its own function.

PowerPoint Presentation: 

This ppt is devoted to my students of B.Sc.II Suggest any change if require on email.