chromosomes from tetrads during

Question

anonymous · Answer

Im not understanding...what is your question

rebeccaxhawaii · Answer

WELCOME TO OS !!!

kikuo · Answer

Tetrads are formed during meiosis. Meiosis is the formation of  four gametes (sex cells). In meiosis, in the prophase stage, before the nuclear membrane breaks up, homologous chromosomes (the corresponding chromosomes from your mom and dad) pair up on the nuclear membrane. This forms a tetrad--a group of four sister chromatids--that will engage in a process called crossing over which results in the genetic diversity among each sexually reproducing organisms. An enzyme cuts strips of DNA out of the homologous chromosomes, and afterwards they exchange alleles (forms of a gene such as brown eyes or blue eyes) that give us this genetic diversity.