Zip1 is a protein in yeast that is required for synaptonemal complex formation. Assuming synaptonemal complexes are required for meiosis in yeast, where do you predict that cells lacking Zip1 will arrest (stop progressing through meiosis)?
A) Prometaphase of meiosis I
B) Metaphase of meiosis I
C) Metaphase of meiosis II
D) Between the zygotene and pachytene stages
E) Diakinesis

Question

Quizplus · Accepted Answer

The synaptonemal complex forms between homologous chromosomes during the zygotene and pachytene stages of prophase I in meiosis, facilitating their alignment and recombination. If Zip1, essential for synaptonemal complex formation, is absent, cells would likely arrest between the zygotene and pachytene stages, unable to properly align and recombine homologous chromosomes.

Zip1 Is a Protein in Yeast That Is Required for Synaptonemal