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.
A sister chromatid refers to either of the two identical copies (chromatids) formed by the replication of a single chromosome, with both copies joined together by a common centromere.In other words, a sister chromatid may also be said as 'one-half' of the duplicated chromosome.A full set of sister chromatids is created during the synthesis (S) phase of interphase, when all the chromosomes in a cell are replicated.ollowing chromosomal replication, the blue chromosome is composed of two identical sister chromatids and the pink chromosome is composed of two identical sister chromatids.