Cell Structure and Function

How are spindle fibers attached to chromosomes in metaphase-I?

• Both centromeres attach to the same pole
• Spindle fibers attach to chromatids randomly
• One centromere of a bivalent attaches to one pole via spindle fibers
• Spindle fibers dissolve completely

What is the arrangement of bivalents during metaphase-I of meiosis?

• At the poles
• Scattered randomly
• At the equatorial plate
• Inside the nucleus

What happens to the nuclear membrane and nucleolus during late prophase-I (diakinesis)?

• They double in size
• They migrate to poles
• They disappear
• They become more prominent

What configuration do bivalents acquire during prophase-I of meiosis due to chiasmata?

• Circular only
• Linear arrangements
• Y-shaped structures
• O, X or 8 configurations

What change occurs in chromosomes during diakinesis?

• Chromosomes decondense
• Crossing-over is completed
• Bivalents become shortest and thickest due to maximum coiling
• Homologous chromosomes pair up