Sister chromatids . a. are two different chromosomes attached to each other; b. are exact copies of one chromosome that are attached to each other; c. arise from the centrioles; d. are broken down by mitosis; e. are chromosomes that carry different genes

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Identify what sister chromatids are in the context of cell biology. Sister chromatids are structures that are relevant during cell division, particularly during the phases of mitosis and meiosis.

Understand that each chromosome, after DNA replication, consists of two identical strands. These strands are known as sister chromatids, and they are joined together by a region called the centromere.

Evaluate the options given in the problem. Consider the definition and characteristics of sister chromatids, such as their formation, structure, and function during cell division.

Eliminate options that do not accurately describe sister chromatids. For example, options that suggest they arise from centrioles or are broken down by mitosis do not align with their known biological characteristics.

Select the option that correctly states that sister chromatids are exact copies of one chromosome and are attached to each other, reflecting their role and formation during the DNA replication phase prior to cell division.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Sister Chromatids

Sister chromatids are identical copies of a single chromosome that are formed during DNA replication. They remain attached at a region called the centromere until they are separated during cell division. This ensures that each daughter cell receives an identical set of chromosomes, which is crucial for maintaining genetic consistency.

Chromosome Structure

A chromosome is a long DNA molecule that contains genetic information. Each chromosome is made up of chromatin, which is a complex of DNA and proteins. During cell division, chromosomes condense and become visible under a microscope, allowing for the organization and distribution of genetic material to daughter cells.

Mitosis

Mitosis is the process of cell division that results in two genetically identical daughter cells from a single parent cell. It involves several stages: prophase, metaphase, anaphase, and telophase, during which sister chromatids are separated and distributed evenly. Mitosis is essential for growth, development, and tissue repair in multicellular organisms.

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