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Outline the formation of chiasmata
- Homologous chromosomes pair together, during Prophase 1 of meiosis, in a process called synapsis.
- During synapsis, X-shaped structures (called chiasmata) can form between non-sister chromatids.
- On average, 1-3 chiasmata form per homologous pair.
- At each chiasma, the maternal DNA can be swapped with the paternal DNA in a process called crossing over.
- Crossing over produces new combinations of alleles, called recombinants.
- The process by which offspring get new combinations of alleles, which differ from the parents, is called recombination.
Latest page update: made by boultont
, May 11 2010, 9:07 PM EDT
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