Match each term with its best definition. Each definition can only be used once and at the ends of this exercises 2 definitions will remain unmatched. A Long molecule of double-stranded DNA and protein G. Phenotype Variant of allele B. Genotype c Variant of gene Gene D. Bullding block of DNA and RNA Allele E Physical and functional unit of heredity Nudeotide Alelle composition F. Chromosome Observable characteristics G. Long molecule of single-stranded DNA and protein