alleryStart learning →What is the synaptonemal complex made of, and where does it sit?
AA protein lattice between the homologs
BA lipid sheath around each homolog
CA ring of actin around the centromere
DA tube of microtubules along the arms
Answer & Solution
Correct answer: A. A protein lattice between the homologs
1. Early in prophase I the two homologs are drawn close together.
2. A lattice of proteins then assembles between them.
3. It starts at specific points and spreads along the full length of the pair.
4. That tight pairing is called synapsis, and it lines the genes up precisely.
5. It is built from protein, not lipid, so a sheath of membrane is the wrong picture.
_Source: OpenStax Biology 1e (CC BY 4.0), Chs 10 and 11, section 11.1 The Process of Meiosis_
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