In dna, only the varies from one nucleotide to another.

Although there are a limited number of amino acids many different types of proteins exist because..

Which of the following occurs after a natural or unnatural disturbance in an ecosystem

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