BIO-111 Exam #3 Review

Front

What stage of mitosis is characterized by the separation of sister chromatids?

Back

Anaphase.

Front

During which stage of mitosis do chromosomes become visible under a light microscope?

Back

Prophase.

Front

What occurs during telophase in mitosis?

Back

Unpacking of chromosomes and formation of a new nuclear envelope.

Front

What is the significance of crossing over during meiosis?

Back

It creates unique genetic variation among organisms.

Front

How does DNA replication differ between prokaryotes and eukaryotes regarding the origin of replication?

Back

Prokaryotic chromosomes have a single origin of replication, whereas eukaryotic chromosomes have many.

Front

What is the primary function of mitosis?

Back

To produce two genetically identical daughter cells.

Front

What is the role of spindle fibers during mitosis?

Back

To help separate the sister chromatids and pull them to opposite poles of the cell.

Front

What happens during prophase of mitosis?

Back

Chromatin condenses into visible chromosomes, and the nuclear envelope begins to break down.

Front

What is the difference between homologous chromosomes and sister chromatids?

Back

Homologous chromosomes are pairs of chromosomes from each parent, while sister chromatids are identical copies of a single chromosome.

Front

What is the purpose of the cell cycle checkpoints?

Back

To ensure that the cell is ready to proceed to the next phase of the cell cycle and to prevent errors.