Scientific explanations are accepted when they lead to accurate predictions
they are consistent with observational evidence.
they seem plausible,
they are consistent with experimental evidence,

what are the choices?

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.