Non-Mendelian Genetics

AP Biology· difficulty 3/5

Genomic imprinting refers to

  • A

    Equal expression of both parental alleles regardless of inheritance origin

  • B

    Differential expression of an allele depending on which parent it came from

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  • C

    Inheritance of mitochondrial DNA exclusively through the maternal lineage

  • D

    Random inactivation of one X chromosome in the somatic cells of females

Explanation

For imprinted genes, only one parental allele (maternal or paternal) is expressed; the other is silenced via methylation.

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