Jump to navigation Jump to search
Original file (SVG file, nominally 512 × 265 pixels, file size: 59 KB)
English: Crossing over occurs during meiosis I, and is the process where homologous chromosomes pair up with each other and exchange different segments of their genetic material to form recombinant chromosomes. In some species crossing over is essential for the normal segregation of chromosomes during meiosis. Crossing over also increases genetic variation, because due to the swapping of genetic material during crossing over, the chromatids held together by the centromere are no longer identical. So, when the chromosomes go on to meiosis II and separate, some of the daughter cells receive daughter chromosomes with recombined alleles. Due to this genetic recombination, the offspring have a different set of alleles and genes than their parents do. In the diagram, genes B and b are crossed over with each other, making the resulting recombinants after meiosis Ab, AB, ab, and aB.
Click on a date/time to view the file as it appeared at that time.
|current||16:44, 23 May 2013||512 × 265 (59 KB)||Abbyprovenzano||User created page with UploadWizard|
- You cannot overwrite this file.
File usage on Commons
File usage on other wikis
The following other wikis use this file: