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.
Report Abuse. The simplest answer is the microtubules that attach to the centromeres of the chromosomes. In the first division the chromatids are not separated allowing the separation of the homologous pairs of chromosomes.The second division the chromatids are separated forming four haploid daughter cells.ach one forms an aster of microtubules that connect to the centromere on each side of the paired chromosomes. This way each half of a paired chromosome is pulled to a pole before cell division. This works on meiosis I tetrads and on meiosis II dyads.