Biology Chapter 7 Mitosis and Meiosis

Front

What is the S phase in the cell cycle?

Back

The S phase (Synthesis phase) is the stage of the cell cycle where DNA replication occurs, resulting in the duplication of chromosomes.

Front

What is Turner's syndrome?

Back

Turner's syndrome is a genetic condition in which a female is born with only one X chromosome, leading to various developmental issues.

Front

What happens during the G1 phase of the cell cycle?

Back

During the G1 phase (Gap 1), the cell grows and carries out normal metabolic processes, preparing for DNA replication.

Front

What is non-disjunction?

Back

Non-disjunction is the failure of chromosomes to separate properly during cell division, which can lead to genetic disorders.

Front

What occurs during prophase of mitosis?

Back

During prophase, chromosomes condense and become visible, the nuclear envelope breaks down, and spindle fibers begin to form.

Front

Define mitosis.

Back

Mitosis is the process of cell division that results in two genetically identical daughter cells, each with the same number of chromosomes as the parent cell.

Front

What is meiosis?

Back

Meiosis is a type of cell division that reduces the chromosome number by half, resulting in four genetically diverse gametes.

Front

What is the role of spindle fibers in mitosis?

Back

Spindle fibers are structures that help separate chromosomes during cell division by attaching to the centromeres and pulling them apart.

Front

What is the difference between mitosis and meiosis?

Back

Mitosis results in two identical daughter cells, while meiosis produces four genetically diverse gametes with half the chromosome number.

Front

What is the significance of the G2 phase?

Back

The G2 phase (Gap 2) is the final stage of interphase where the cell prepares for mitosis, ensuring all DNA is replicated and damage is repaired.