Results (a) Wild-type flower (b) Class A mutants (c) Class B mutants (d) Class C mutants Stamen Carpel Sepal- Petal- Whorl 1: Sepals Whorl 2: Petals Whorl 3: Stamens Whorl 4: Carpels Whorl 1: Carpels Whorl 2: Stamens Whorl 3: Stamens Whorl 4: Carpels Whorl 1: Sepals Whorl 2: Sepals Whorl 3: Carpels Whorl 4: Carpels Whorl 1: Sepals Whorl 2: Petals Whorl 3: Petals Whorl 4: Sepals Conclusion: In wild-type flowers: Gene Product Class A gene products - Class A + class B gene products- Class B+ class C gene products Class C gene products Flower whorl affected sepals in the 1st whorl petals in the 2nd whorl stamens in the 3rd whorl carpels in the 4th whorl 22.15 Analysis of homeotic mutants in Arabidopsis thalian led to an understanding of the genes that determine floral structures in plants.

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Gene Interactions

When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.

Gene Expression

Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.