Imprinting involves parent-specific DNA methylation patterns established during gametogenesis and maintained after fertilization to silence either the paternal or maternal allele. Which statement is true?

Imprinting involves parent-specific DNA methylation patterns established during gametogenesis and maintained after fertilization to silence either the paternal or maternal allele. Which statement is true?

• A. Imprinting is random with no parent origin.
• B. Imprinting silences all genes on the chromosome.
• C. Imprinting patterns are erased after fertilization and re-established randomly.
• D. Imprinting involves parent-specific DNA methylation patterns established during gametogenesis and maintained after fertilization to silence either the paternal or maternal allele.

Answer: (D)