I don't agree with the terminology he used as both DNA and RNA are made up of nucleotides. Each nucleotide is made up of a nucleobase, a sugar (a pentose), and one or more phosphate groups. In the case of DNA, the nucleobases are adenine, thymine, guanine, and cytosine (A, T, G, and C), and the sugar is deoxyribose. In the case of RNA, the nucleobases are the same, except uracil (U) substitutes for thymine (T) and the sugar is ribose. Hence the acronyms... DNA = deoxyribonucleic acid RNA = ribonucleic acid Diana > -----Original Message----- > From: autosomal-dna-bounces@rootsweb.com [mailto:autosomal-dna- > bounces@rootsweb.com] On Behalf Of Larry Vick > Sent: Sunday, October 20, 2013 2:07 PM > To: autosomal-dna@rootsweb.com > Subject: Re: [AUTOSOMAL-DNA] Family finder matches what to make of them > > Terminology is interesting.  In Tales from the Genome (the course 23andMe is > sponsoring), Matt COOK (one of the instructors) said that nucleotides are > really components of RNA while deoxynucleotides are components of DNA.  I > found that interesting since we use the terminology single nucleotide > polymorphism to describe changes in DNA alleles. > > Hopefully, I didn't add more terminology problems in my description. > > Regards, > > Larry