What term describes each strand in the duplicated chromosome?

What term describes each strand in the duplicated chromosome?

• A. Chromatid
• B. Centromere
• C. Chromosome
• D. Nucleolus

Answer: (A)

After DNA replication, a chromosome contains two identical DNA molecules that are joined at a central region. Each of these identical copies is called a chromatid, and together they’re known as sister chromatids. So the term for each strand in the duplicated chromosome is chromatid. The centromere is the region where the two chromatids are held together, not the strand itself. A chromosome can refer to the whole structure (two chromatids bound together) or a single chromatid, and the nucleolus is a separate nuclear structure involved in ribosome production.

After DNA replication, a chromosome contains two identical DNA molecules that are joined at a central region. Each of these identical copies is called a chromatid, and together they’re known as sister chromatids. So the term for each strand in the duplicated chromosome is chromatid. The centromere is the region where the two chromatids are held together, not the strand itself. A chromosome can refer to the whole structure (two chromatids bound together) or a single chromatid, and the nucleolus is a separate nuclear structure involved in ribosome production.