Principles of inheritance
Genotypic variation
Other forms of heritable variation
Other sources of heritable variation
Epigenetic effects
Copy number variants
Mobile elements
Quantitative variation and heritability
Novel sources of genetic variation
The practice of plant breeding
Breeding methods
Plant Breeders' rights
New technologies for plant breeding
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Other sources of heritable variation

Most heritable genetic variation is due to differences in the DNA sequence of a gene.

But there are also other forms of variation which can affect the phenotype:

These are: