Crossing over, or recombination, may be the exchange of chromosome segments between nonsister chromatids in meiosis
Crossing over creates new combinations of genes when you look at the gametes which are not found in either parent, adding to diversity that is genetic.
Homologues and Chromatids
All cells are diploid, meaning they have pairs of every chromosome. One person in each set originates from the person’s mom, plus one through the daddy. The 2 people of each set are known as homologues. People of a homologous pair carry the exact same set of genes, which occur in identical jobs over the chromosome. The particular kinds of each gene, called alleles, can be various: One chromosome may carry an allele for blue eyes, and also the other an allele for brown eyes, as an example.
Meiosis could be the procedure in which chromosomes that are homologous divided to make gametes. (more…)