Where in the body does fertilization usually occur

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.

Paint and solvents pose no potential hazard to human health. select the best answer from the choices provided t f

How are viruses different from eukaryotic cells?