Join thousands of students who trust us to help them ace their exams!Watch the first video
Multiple Choice
Which event occurs during the prophase II phase of meiosis II?
A
Homologous chromosomes pair up and exchange segments.
B
Chromosomes line up at the metaphase plate.
C
The nuclear envelope breaks down and spindle fibers form.
D
Sister chromatids are pulled apart to opposite poles.
Verified step by step guidance
1
Understand that meiosis is a type of cell division that reduces the chromosome number by half, creating four haploid cells. It consists of two stages: meiosis I and meiosis II.
Recall that prophase II is a stage in meiosis II, which follows meiosis I. During meiosis I, homologous chromosomes are separated, resulting in two haploid cells.
In prophase II, the nuclear envelope that surrounds the nucleus breaks down, which is a key event that allows the chromosomes to be accessed by the spindle fibers.
Spindle fibers begin to form during prophase II. These fibers are crucial for the movement of chromosomes during cell division.
Note that unlike prophase I, there is no pairing of homologous chromosomes or exchange of genetic material during prophase II. The focus is on preparing the chromosomes for alignment and separation in the subsequent stages of meiosis II.