Crossing over
Crossing over occurs once chromosomal replication has occurred in meiosis, (i.e. when all the bivalents have 4 chromatids.) It is the process whereby homologous chromosomes exchange sections of genetic material. Crossing over is essential to the survival of a population as it contributes to genetic variation. [1]
- ↑ Hartl and Jones, (2009,) Genetics analysis of genes and genomes, 7th edition, London: Jones and Bartlett publishers.