Meiosis Stages and Events

The video tutorial explains the stages of meiosis, focusing on the processes occurring in prophase 1, metaphase 1, anaphase 1, telophase 1, prophase 2, metaphase 2, anaphase 2, and telophase 2. It describes how DNA coils, chromosomes become visible, and synapsis occurs in prophase 1. In metaphase 1, chromosomes align on the metaphase plate, and spindle fibers attach. Anaphase 1 involves the separation of homologous chromosomes. Telophase 1 sees the nuclear membrane reforming. Prophase 2 initiates with the breakdown of the nuclear envelope and spindle formation. Metaphase 2 and anaphase 2 involve spindle fibers binding and chromatids moving to opposite poles, concluding with telophase 2 where nuclear envelopes reform.

What happens to DNA during Prophase 1?

• It uncoils and becomes less visible.

• It coils tightly and becomes visible.

• It duplicates and forms new strands.

• It breaks down into smaller pieces.

During Metaphase 1, what is the orientation of homologous chromosomes?

• They line up parallel to each other on the metaphase plate.

• They do not line up on the metaphase plate.

• They line up randomly on the metaphase plate.

• They line up in a single file on the metaphase plate.

What significant event occurs during Anaphase 1?

• Homologous chromosomes are pulled to opposite poles.

• The nuclear membrane reforms.

• Sister chromatids are separated.

• DNA replication occurs.

What is the state of the nuclear membrane during Telophase 1?

• It becomes thicker.

• It remains dissolved.

• It reforms around the daughter nuclei.

• It breaks down completely.

What happens to the nuclear envelope during Prophase 2?

• It breaks down again.

• It thickens.

• It reforms completely.

• It remains intact.

During Metaphase 2, how do spindle fibers interact with chromosomes?

• They attach to only one side of each centromere.

• They attach to the ends of chromosomes.

• They attach to both sides of each centromere.

• They do not attach to centromeres.

What occurs during Anaphase 2?

• Chromosomes duplicate.

• The nuclear membrane reforms.

• Sister chromatids are pulled apart.

• Homologous chromosomes are separated.

What is the final event in Telophase 2?

• Nuclear envelopes reform around daughter chromosomes.

• DNA replication occurs.

• Spindle fibers form.

• Chromosomes condense.