Question

chromosomes
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which statement about sister chromatids is true?
one sister chromatid is inherited from each parent.
sister chromatids are always in every cell.
sister chromatids are only present during cell reproduction.
each sister chromatid forms a lobe of a chromosome.
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Explanation:

• Option 1: Sister chromatids are identical copies formed by DNA replication within a cell, not inherited from parents.
• Option 2: Sister chromatids are not always present. They form during the S - phase of the cell cycle (for somatic cells) or during the interphase before meiosis (for germ cells). In non - dividing cells (in G0 phase), there are no sister chromatids.
• Option 3: Sister chromatids form during the S - phase of the cell cycle (for mitosis or meiosis). They are present during cell reproduction (mitosis or meiosis) when the cell is preparing to divide its genetic material.
• Option 4: Sister chromatids are not lobes. A chromosome with sister chromatids has two chromatids joined at the centromere.

Answer:

Sister chromatids are only present during cell reproduction.