Question

A duplicated chromosome consists of two ______.

a.centrosomes
b.sister chromatids
c.centromeres
d.genomes

Answer 1

A duplicated chromosome is composed of two sister chromatids, which are genetically identical copies held together at the centromere.

Step-by-step explanation:

A duplicated chromosome consists of two sister chromatids. During the S phase of interphase, DNA replication occurs, resulting in each chromosome being duplicated to form these two identical copies.

These sister chromatids are joined together at a specific region known as the centromere.

It is essential to understand that a sister chromatid refers to one half of a duplicated chromosome and that the two sister chromatids are genetically identical.

During mitosis, cohesin proteins hold the sister chromatids together at the centromere until they are separated into individual chromosomes.

correct answer b.sister chromatids

Answer 2

A duplicated chromosome consists of two sister chromatids held together at the centromere. The correct answer is B

Step-by-step explanation:

This structure allows for proper separation of the chromatids during cell division. A duplicated chromosome consists of two sister chromatids. During the S phase of interphase in the cell cycle, each chromosome is replicated to produce two identical copies known as sister chromatids. These chromatids are held together at a specific region called the centromere. The centromere contains proteins, including cohesins, which maintain the attachment between the two chromatids until they are separated during cell division.

This ensures accurate segregation of the genetic material during the process of mitosis or meiosis. It is important to distinguish between sister chromatids and centrosomes, which are also duplicated during interphase but serve a different role in cell division as the organizing centers for microtubules that form the spindle apparatus. A duplicated chromosome consists of two sister chromatids. The sister chromatids are identical copies of each other and are held together at a region called the centromere. The correct answer is B