Marie has left written instructions directing doctors and family members to avoid or stop using life-sustaining procedures in the event of a terminal condition. such an instrument is called the

Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.