Crossing over

• Crossing over may be defined as an exchange of genetic material between non- sister chromatids of homologous chromosomes resulting in a new combination of genes.
• The crossing over takes place during the early stage of prophase first of meiosis cell division.

Mechanism of crossing over:

The process of crossing over involves the following stages:

1.Synapsis

2.Duplication of chromosomes

3.Crossing over

4.chiasmata formation

5.Terminalisation