In which nuclear division process do sister chromatids segregate?

• A. Meiosis I
• B. Binary fission
• C. Meiosis II
• D. Mitosis

Answer: (D)

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 centromere. They are formed during DNA replication in the S phase of the cell cycle.
2. Learn about the process of mitosis: Mitosis is a type of nuclear division that results in two daughter cells, each having the same number and type of chromosomes as the parent cell. It is used for growth, repair, and asexual reproduction.
3. Identify the phase in mitosis where sister chromatids segregate: During mitosis, sister chromatids separate during the anaphase stage. The centromeres split, and the chromatids are pulled to opposite poles of the cell by the spindle fibers.
4. Compare mitosis with other nuclear division processes: Meiosis I involves the separation of homologous chromosomes, not sister chromatids. Meiosis II is similar to mitosis in that sister chromatids are separated, but it occurs in the context of sexual reproduction. Binary fission is a form of asexual reproduction in prokaryotes and does not involve the segregation of sister chromatids.
5. Conclude that mitosis is the nuclear division process where sister chromatids segregate, as it specifically involves the separation of these identical copies during anaphase.