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Multiple Choice
What are sister chromatids, and during which phase of cell division do they separate?
A
Sister chromatids are different chromosomes that pair up during mitosis, and they separate during telophase.
B
Sister chromatids are identical copies of a chromosome connected by a centromere, and they separate during anaphase.
C
Sister chromatids are different chromosomes that pair up during meiosis, and they separate during metaphase.
D
Sister chromatids are identical copies of a chromosome connected by a centromere, and they separate during prophase.
Verified step by step guidance
1
Understand the concept of sister chromatids: Sister chromatids are identical copies of a single chromosome that are connected by a structure called the centromere. They are formed during DNA replication in the S phase of the cell cycle.
Recognize the phases of cell division: Cell division occurs in stages, including prophase, metaphase, anaphase, and telophase. Each phase has distinct events that contribute to the process of mitosis or meiosis.
Identify the phase where sister chromatids separate: During anaphase, the sister chromatids are pulled apart by the spindle fibers towards opposite poles of the cell. This separation ensures that each new daughter cell receives an identical set of chromosomes.
Clarify common misconceptions: Sister chromatids are not different chromosomes; they are identical copies of the same chromosome. They do not separate during prophase or telophase, but specifically during anaphase.
Review the importance of sister chromatid separation: The separation of sister chromatids is crucial for genetic stability, ensuring that each daughter cell receives the correct number of chromosomes, which is vital for proper cell function and organismal development.