This document discusses gene interactions and their mechanisms. It describes how genes interact with each other and the environment to influence phenotypes. The main types of gene interactions are allelic, including complete dominance, incomplete dominance and co-dominance, and non-allelic, such as additive, duplicate, dominant suppression, dominant and recessive epistasis. Examples are provided for each type of interaction.
3. INTRODUCTION
• Johann Gregor Mendel (1822–1884) was a lifelong
learner, teacher, scientist, and man of faith.
• In 1865, Mendel presented the results of his experiments
with nearly 30,000 pea plants to the local natural history
society.
4. INTRODUCTION
• Mendel’s laws of inheritance
– Law of Dominance
– Law of Segregation
– Law of Independent Assortment
• One gene determines one trait
5. GENE INTERACTION
• The contribution of
genes to the
phenotypic character
are modified by
interactions with
other genes and
environment.
• The works of Bateson
and Punnett gave
early examples of
gene interactions.
7. MECHANISM OF GENE
INTERACTION
• Genes are segments of DNA
that code for particular
polypeptide in the form of a
specific sequence of its base
pair.
• Proteins are the end products
of gene expression, and so gene
interactions are interactions between proteins that
are controlled by these genes.
19. REFERENCES
• Charles Molnar and Jane Gair, Concepts of Biology-1st
Canadian Edition, The B.C. Open Textbook Project, Pp- 265-
303.
• Gardner, M. J. Simmons, D. P. Snustad, PRINCIPLES OF
GENETICS, 8TH ED, John Wiley & Sons, 2006, Pp- 33-35.
• D. J. Cove, Genetics, CUP Archive, 30-Nov-1971, Pp- 45-57.
• B N Behera, Genetics through Problems, Sarup & Sons, 2004 ,
Pp- 45-47.
• https://www2.estrellamountain.edu/faculty/farabee/biobk/
BioBookgeninteract.html
• http://www.biologydiscussion.com/genetics/gene-
interactions/gene-interactions-allelic-and-non-allelic-cell-
biology/38795