What are chromosomes that have replicated copies held together by a centromere called?

What are chromosomes that have replicated copies held together by a centromere called?

• A. Haploids
• B. Sister chromatids
• C. Homologous chromosomes
• D. Chromatin

Answer: (B)

Chromosomes that have replicated copies held together by a centromere are referred to as sister chromatids. During the cell cycle, specifically in the S phase, each chromosome is duplicated to ensure that both daughter cells receive an identical set of chromosomes during cell division. The two identical copies are linked at a region called the centromere, allowing them to remain together until the appropriate stage of cell division, where they are separated and pulled to opposite poles of the dividing cell. This ensures accurate distribution of genetic material. Haploids refer to cells that contain a single set of chromosomes and do not describe the relationship between replicated chromosomes. Homologous chromosomes are pairs of chromosomes, one from each parent, that may contain different alleles for the same genes. Chromatin is the material that makes up chromosomes, comprised of DNA and proteins, and is not specifically related to the state of being replicated and held together by a centromere.

Chromosomes that have replicated copies held together by a centromere are referred to as sister chromatids. During the cell cycle, specifically in the S phase, each chromosome is duplicated to ensure that both daughter cells receive an identical set of chromosomes during cell division. The two identical copies are linked at a region called the centromere, allowing them to remain together until the appropriate stage of cell division, where they are separated and pulled to opposite poles of the dividing cell. This ensures accurate distribution of genetic material.

Haploids refer to cells that contain a single set of chromosomes and do not describe the relationship between replicated chromosomes. Homologous chromosomes are pairs of chromosomes, one from each parent, that may contain different alleles for the same genes. Chromatin is the material that makes up chromosomes, comprised of DNA and proteins, and is not specifically related to the state of being replicated and held together by a centromere.