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

Verified step by step guidance

1. Understand the definition of sister chromatids: Sister chromatids are identical copies of a single chromosome that are connected by a centromere.
2. Consider option a: Two different chromosomes attached to each other would not be identical copies, so this is incorrect.
3. Consider option b: Exact copies of one chromosome that are attached to each other accurately describes sister chromatids.
4. Consider option c: Sister chromatids do not arise from centrioles; centrioles are involved in cell division but not in the formation of chromatids.
5. Consider option d and e: Mitosis separates sister chromatids, not breaks them down, and sister chromatids carry the same genes, not different ones.

Key Concepts

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, specifically in mitosis and meiosis. This ensures that each daughter cell receives an identical set of chromosomes.

Chromosome Structure

A chromosome is a long DNA molecule that contains genetic information. Each chromosome consists of two sister chromatids joined together at the centromere. Understanding the structure of chromosomes is essential for grasping how genetic information is organized and passed on during cell division.

Mitosis

Mitosis is the process of cell division that results in two genetically identical daughter cells from a single parent cell. During mitosis, sister chromatids are separated and distributed to each daughter cell, ensuring that they each receive the same genetic material. This process is crucial for growth, development, and tissue repair in multicellular organisms.