Genes are the basic physical and functional units of heredity that are made up of DNA. A gene typically consists of coding regions called exons that specify amino acid sequences, non-coding regions called introns, and regulatory sequences that determine when and where a protein is made. There are different types of genes, including simple genes with one coding sequence, variable genes where a polypeptide is coded by multiple genes, and transposon genes which are sequences of DNA that can move to different locations in the genome.

1. MODERN CONCEPT OF
GENE STRUCTURE

2. CONTENTS
• Gene
• History of gene
• Structure of gene
• Types of Gene’s

3. Gene
• A gene is the basic physical &functional unit of heredity.
• Gene’s are made up of DNA.

4. History of Gene
• Danish Botanist WILHELM JOHANNSEN coined the word
gene in 1909.
• WILLIAM BATESON in 1905 coined the term GENETICS from
the word gene

5. Structure of Gene
• Genes are segments of decarboxylic acid {DNA} that contain the
code for a specific protein that functions in one or more types of
cells in the body.
• Chromosomes are structures within cells that contain a person’s
genes.

6. Parts of gene
Gene consists of three types of nucleotide sequence:-
1. Coding regions, called EXONS, which specify a sequence of
amino acids.
2. Non coding regions, called INTRONS, which do not specify
amino acids.
3. Regulatory sequences, which play a role in determining when
and where the protein is made.

7. Parts of gene

8. Types of Gene’s
1. Simple Gene
2. Variable Gene
3. Transposone Gene

9. SIMPLE GENE
• Simple gene have a coding sequence of bases in one DNA
strand .
• Upstream the coding region,the promoter is present.
• Down stream ,the termination region is present.

10. VARIABLE GENE
• Certain polypeptides are coded not by one gene but they are
coded by more than one gene present on the same or different
chromosomes .

11. TRANSPOSONE GENE
• Transposable elements [TEs] also known as “Jumping Genes” or
Transposons are sequence of DNA that move or jump from one
location in the genome to another.

12. Thank you