Genomic imprinting is generally due to the addition of methyl (CH3) groups to C nucleotides and chemical histone changes to silence a given gene. If this depends on the sex of the parent who transmits the gene, which of the following statements must be true? Methylation must be reversible in ovarian and testicular cells. The imprints are transmitted only to gamete-producing cells. Genes required for early development stages must not be imprinted. Methylation of this kind must occur more in males than in females..