Linkage, Nondisjunction, and Pedigrees
Humans have roughly twenty thousand genes distributed across twenty-three chromosome pairs. Hundreds of genes therefore share each chromosome. During meiosis, nearby loci can travel together, so you should check the evidence before predicting independent assortment. Offspring counts can reveal linka
Non-Mendelian Inheritance
Try sorting everyone in a classroom into the two height categories Mendel used for his peas. Human height forms a continuous range, with most people near the middle. ABO blood types give a different pattern: A, B, AB, and O are discrete categories. To explain both, follow the route from inherited al
