Cell Structure and Function Quiz

• DNA replication occurs
• Homologous chromosomes begin to repel each other but remain attached at chiasmata
• Crossing-over begins
• Spindle fibers form

• Diploid
• Tetravalent
• Tetrad
• Both Tetravalent and Tetrad

• Homologous chromosomes begin to pair
• Crossing-over occurs between non-sister chromatids at the end of pachytene
• Nuclear membrane reforms
• Sister chromatids separate

• Because DNA replication occurs here
• Because it has fewer sub-stages
• Because cytokinesis happens simultaneously
• Because it involves complex processes like synapsis and crossing over

• Chromosomes are fully separated
• Chromosomes appear as long, thin threads with chromomeres
• Homologous chromosomes are paired
• Crossing over occurs