2 Genes come in pairs. 3 Genes don't blend. Some genes are dominant. 5 Genetic inheritance follows rules. 6 Genes are real things.
All cells arise from pre-existing cells.
9 Specialized chromosomes determine gender. 10 Chromosomes carry genes. 11 Genes get shuffled when chromosomes exchange pieces. 12 Evolution begins with the ineritance of gene variation. 13 Mendelian laws apply to human beings.