Question

Genetically identical DNA strands are called __________ ______________ and are held together by a central region called the ______________

A. Sister chromatids, held together by the centromere
B. Homologous chromosomes, held together by the telomere
C. Nucleotides, held together by covalent bonds
D. Base pairs, held together by hydrogen bonds

Answer 1

Sister chromatids are genetically identical DNA strands held together by a centromere, forming after DNA is replicated during the S phase of interphase.

Step-by-step explanation:

Genetically identical DNA strands are called sister chromatids and are held together by a central region called the centromere. The process occurs during DNA duplication in the S phase of interphase. After replication, two identical chromatids, referred to as sister chromatids, are conjoined and are visible under a light microscope. They remain attached at the centromere by proteins known as cohesin until the cell enters anaphase II of mitosis or meiosis when they are separated.