Meiosis/ The Phases

The video tutorial explains the stages of meiosis, starting with prophase one where chromatin condenses and centrosomes migrate. Synapsis and crossing over occur, leading to genetic diversity. Metaphase one aligns homologous chromosomes, followed by anaphase one where they move apart. Telophase one and cytokinesis result in two haploid cells. Prophase two begins without DNA replication, leading to metaphase two where centromeres split. Anaphase two separates sister chromatids, and telophase two with cytokinesis produces four haploid cells. The process ensures genetic diversity and prepares for fertilization.

What is the significance of synapsis during prophase one?

• It allows for crossing over and genetic diversity.

• It causes the nuclear membrane to disappear.

• It results in the condensation of chromatin.

• It leads to the formation of centrosomes.

During metaphase one, how do homologous chromosomes align?

• In a single file line.

• Randomly throughout the cell.

• In pairs at the cell's equator.

• Independently at the cell's equator.

What occurs during anaphase one of meiosis?

• Homologous chromosomes move to opposite poles.

• Sister chromatids are pulled apart.

• Chromosomes line up at the equator.

• The nuclear membrane reforms.

Why is there no DNA replication before prophase two?

• Because the DNA is already duplicated.

• Because the cell is in a resting phase.

• Because the chromosomes are not needed.

• Because the cell skips interphase.

What happens to the centromeres during metaphase two?

• They duplicate.

• They split apart.

• They remain intact.

• They disappear.

What is the outcome of telophase two and cytokinesis?

• Chromosomes condense into chromatin.

• Four haploid cells are produced.

• The nuclear membrane dissolves.

• Two diploid cells are formed.

How does the chromosome number in the resulting cells compare to the original germ cell after meiosis?

• Double the diploid number.

• One-fourth the diploid number.

• Half the diploid number.

• The same diploid number.