Altmann theory DNA DNA double helix De Vries theory Galtonian theory Mendelianism Mendelism Verworn theory Weismann theory Weismannism Wiesner theory allele allelomorph anticodon biotype birth character chromatid chromatin chromosome codon deoxyribonucleic acid determinant determiner diathesis endowment eugenics factor gene gene complex gene flow gene pool genesiology genetic code genetic drift genetics genotype hereditability hereditary character heredity heritability heritage inborn capacity inheritability inheritance mRNA matrocliny messenger RNA nucleotide operator gene operon patrocliny pharmacogenetics recessive character regulator gene replication ribosomal RNA structural gene tRNA transfer RNA