Definition of gene, nucleotide, and allele in DNA explained.
Gene: A gene is a section of DNA consisting of sequences of nucleotide monomers (A, T, C, G) that encodes the information to make a specific product, like a protein.
Nucleotide: A nucleotide is the basic building block of DNA, composed of a sugar, a phosphate group, and a nitrogenous base (A, T, C, G).
Allele: An allele is a variant form of a gene, differing in its DNA sequence, which can result in different traits or variations within a population.
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