How is the expression of surface antigens on red blood cells determined?

Construct an explanation about the function of mitosis for multicellular organisms

Apart of an ecosystem that can restrict the growth of a population is referred to as

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.