Which correctly describes sister chromatids?
They make up the mitotic spindle within the cell.
They form during metaphase when DNA is being replicated.
They are part of the lined-up chromosomes in mitosis.
They are the daughter cells that form during cell replication.
They are part of the lined-up chromosomes in mitosis.
The correct description of sister chromatids is that they are part of the lined-up chromosomes in mitosis.
The correct answer is: "They are part of the lined-up chromosomes in mitosis."
Sister chromatids are replicated copies of a single chromosome that are tightly connected to each other. They are formed during the S phase of the cell cycle, when DNA is being replicated. Each replicated chromosome consists of two identical sister chromatids held together by a region called the centromere.
During mitosis, the sister chromatids line up along the center of the cell, forming a structure called the metaphase plate. It is at this stage that the chromosomes are maximally condensed and visible under a microscope. Later, in anaphase, the sister chromatids separate and move towards opposite ends of the cell. Once the cell divides, each daughter cell will receive one complete set of chromosomes, with each chromosome consisting of a single chromatid.
To answer this question, it requires a basic understanding of the cell cycle and the events that occur during mitosis, specifically the behavior of chromosomes and sister chromatids.