DNA, or deoxyribonucleic acid, is the molecule that makes up an organismâs genome in the nucleus of every cell. It consists of genes, which are the molecular codes for proteins â the building blocks of our tissues and their functions.he percentage of genes or DNA that organisms share records their similarities. We share more genes with organisms that are more closely related to us. Humans belong to the biological group known as Primates, and are classified with the great apes, one of the major groups of the primate evolutionary tree.
exists and is an alternate of . Making the world better, one answer at a time. Sister chromatids are attached to each other in the part of the chromosome called the centromere. Sister chromatids are attached to each other in the part of the chromosome called the centromere.
In the diagram, (1) refers to a chromatid: one-half of two identical threadlike strands of a replicated chromosome. During cell division, the identical copies (called a  sister chromatid pair ) are joined at the region called the centromere (2).Once the paired sister chromatids have separated from one another (in the anaphase of mitosis) each is known as a daughter chromosome.n general, sister chromatids are either of the two chromatids of the same chromosome joined together by a common centromere. Once sister chromatids have separated (during the anaphase of mitosis or the anaphase II of meiosis during sexual reproduction), the strands are called daughter chromosomes.