Which of the following would be most likely to cause a mutation? A.
the addition of nucleotides to the 3’ end of the growing strand

B.
the insertion of a mismatched nucleotide into a DNA strand

C.
the unwinding of the DNA strand

D.
the synthesis of short stretches of DNA

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.

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

Write the balanced chemical equation forphotosynthesis.