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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.

Across of blue x blue (both heterozygous) would result in

Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what