What occurs during Telophase 1 of meiosis?

What occurs during Telophase 1 of meiosis?

• A. Two identical sister chromatids are formed
• B. Chromosomes coil up
• C. Spindle breaks down and cytoplasm divides
• D. Chromosomes align at the cell equator

Answer: (C)

During Telophase 1 of meiosis, the key events include the breakdown of the spindle apparatus and the division of the cytoplasm, a process known as cytokinesis. This marks the conclusion of the first meiotic division, where homologous chromosomes that have separated in an earlier phase now reach the opposite poles of the cell. As the spindle apparatus disassembles, nuclear envelopes reform around the separated sets of chromosomes. It is also the stage when the cytoplasm divides, resulting in two daughter cells, each containing half the original number of chromosomes, still in a duplicated state. This is a crucial step in reducing the chromosome number by half, which is essential for sexual reproduction. Other choices provided do not accurately describe the events of Telophase 1. For example, the formation of identical sister chromatids occurs earlier in the cell cycle during DNA replication. The coiling of chromosomes and alignment at the equator happen in different stages of mitosis and meiosis, specifically before separation during metaphase. Thus, the correct identification of Telophase 1 events highlights the unique transitions critical for generating genetic diversity through meiosis.

During Telophase 1 of meiosis, the key events include the breakdown of the spindle apparatus and the division of the cytoplasm, a process known as cytokinesis. This marks the conclusion of the first meiotic division, where homologous chromosomes that have separated in an earlier phase now reach the opposite poles of the cell.

As the spindle apparatus disassembles, nuclear envelopes reform around the separated sets of chromosomes. It is also the stage when the cytoplasm divides, resulting in two daughter cells, each containing half the original number of chromosomes, still in a duplicated state. This is a crucial step in reducing the chromosome number by half, which is essential for sexual reproduction.

Other choices provided do not accurately describe the events of Telophase 1. For example, the formation of identical sister chromatids occurs earlier in the cell cycle during DNA replication. The coiling of chromosomes and alignment at the equator happen in different stages of mitosis and meiosis, specifically before separation during metaphase. Thus, the correct identification of Telophase 1 events highlights the unique transitions critical for generating genetic diversity through meiosis.