A karyotype is a micrograph that arranges homologous chromosome pairs in decreasing size order. It is used to study chromosomes stained during cell metaphase. Nondisjunction is a cell division error where sister chromatids do not separate properly, which can cause conditions like Down syndrome.

1. 11.3 Chromosomes and Human Heredity

3. Karotype

4. Complex Inheritance and Human Heredity Nondisjunction - cell division during which sister chromatids fail to separate properly Ex: Down Syndrome

5. Complex Inheritance and Human Heredity