Question

In synaptonemal complex strand exchange between chromosomes occurs at this average _______distance?

a)400-800
b)2-120
c)120-800
d)120-400 nm

Answer 1

The average distance at which strand exchange occurs between chromosomes in the synaptonemal complex during meiosis is c) 100-300 nanometers (nm).

Step-by-step explanation:

The average distance the synaptonemal complex allows strand exchange between chromosomes is c) 100-300 nanometers (nm).

In the synaptonemal complex, crossing over or crossover, which is the exchange of chromosomal segments between homologous (non-sister) chromatids, can be observed as chiasmata. This process occurs during prophase I of meiosis. Large protein assemblies known as recombination nodules are located at intervals along the synaptonemal complex and they mark the points of later chiasmata as well as mediate the multistep process of crossover. The synaptonemal complex begins to break down after crossover, and chromosomes condense further as they prepare for the next stages of meiosis where they will eventually be separated.