In cell division, new cells are made from an old cell.
During cell division, these chromosomes are copied and one set of chromosomes are given to each new cell.
Homologous Chromosomes are chromosomes that contain the same genes, but not necessarily the same alleles
B b A A c c d D
Crossing over is a process in which different parts of homologous chromosomes switch places
Crossing over leads to increased genetic recombination
This occurs during Prophase I
II. Cell Division-Meiosis -Crossing over and the exchange of genes in meiosis is a major source of variation among organisms. In meiosis, you end up with 4 daughter cells that can be combined with another sex cell to make a new organism. MEIOSIS I MEIOSIS II Possible gametes Possible gametes Chromosome A Chromosome B Chromosome a Chromosome b