When either a mother's or father's version of a gene is expressed in a cell, but not both, we refer to the gene as
A) imprinted.
B) dominant.
C) recessive.
D) an SNP.

Question

Quizplus · Accepted Answer

When a gene is imprinted, it means that only one allele (either the maternal or paternal version) is expressed in a cell, while the other allele is silenced. This is due to epigenetic modifications to the DNA, such as DNA methylation, that determine which allele is expressed. Dominant and recessive genes refer to the way in which alleles interact with each other to determine a trait, while SNP (single nucleotide polymorphism) refers to a variation in a single nucleotide in the DNA sequence.

When Either a Mother's or Father's Version of a Gene