Question
At metaphase I, homologous chromosomes are connected only at what structures?
A. chiasmata B. recombination nodules C. microtubules D. kinetochores
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Evidence boundary
This page answers the cited single metaphase-I review item and preserves its four options. The search spelling “metaphase 1” refers to the original question's Roman-numeral stage I. The explanation concerns the standard crossover-associated meiotic mechanism; it does not claim that every organism requires crossing-over for chromosome segregation or that chiasmata replace sister-chromatid cohesion.