[Solved] ________ The most common numerical autosomal abnormality A)47, XXX B)45, XO C)Trisomy 18 D)Trisomy 21 E)47, XXY Transforming Substance: A factor or component that induces change or transformation in a substance, often used in context with genetic material. R Bacteria: Bacteria that possess a smooth (R) colony morphology, often referenced in studies of bacterial genetics. Chargaff's Rule: The observation that DNA from any cell of all organisms has a 1:1 ratio of pyrimidine and purine bases; specifically, adenine pairs with thymine and cytosine pairs with guanine. Adenine: One of the four nucleobase molecules used in forming nucleotides of the nucleic acids DNA and RNA; it pairs with thymine in DNA and with uracil in RNA.