Genomic Imprinting Is Generally Due to the Addition of Methyl

question 48

Multiple Choice

Genomic imprinting is generally due to the addition of methyl (-CH3) groups to cytosine nucleotides to silence a given allele of a gene. If this process depends on the sex of the parent who transmits the gene, which of the following statements must be true?

• A) Genes required for early development stages must not be imprinted.
• B) Methylation of this kind must occur more in males than in females.
• C) Methylation must be reversible in ovarian and testicular cells.
• D) The imprints are transmitted only to gamete-producing cells.

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