Synapse occurs specifically between homologous pairs.
Homologous chromosomes are non-identical chromosomes that can pair (synapse) during meiosis. Except for the sex chromosomes, homologous...
Sperm and eggs have half as many chromosomes as other cells because they are Gametes which contain one set of chromsomes, as opposed to the regular two. (The 2 join and you end up with a total of 46,...