when are tetrads formed
The tetrad is a structure that only exists during the late stages of Prophase I and early stages of Metaphase I in Mieosis I. Prior to being sent off to different cells, the h â¦ omologous chromosomes clump together in these units called tetrads consisting of 2 chromosomes and 4 chromatids. Corresponding parts of the 2 homologous chromosomes are able to switch with each other during this state in a process known as crossing over.