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Genomic Imprinting in Plants

As per the standard Mendelian understanding of genetics, both the maternal and paternal genomes contribute equally to the offspring. However, there are few deviations to this mendelian idea including cytoplasmic inheritance, gene conversion, epistasis and many more. One such deviation is genome imprinting. A subset of parent-of-origin effects is caused by imprinted gene expression imprinted genes are expressed predominantly from either the maternal or paternal allele. This process is considered as epigenetic phenomenon because alleles that have identical or nearly identical sequences are expressed differently.