What is the name for the point at which the two halves of a duplicated chromosomes are connected
The two identical chromosomes that result from DNA replication are referred to as sister chromatids. Sister chromatids are held together by proteins at a region of the chromosome called the centromere.Chromosomes undergo additional compaction at the beginning of mitosis. When fully condensed, replicated chromosomes appear as thick X-shaped structures that are readily observed under the microscope (see figure below).hromosomes are packaged by histone proteins into a condensed structure called chromatin. The first level of packaging is represented as the “beads-on-a-string” structure. The condensed chromatin is folded and tightly coiled, like a coiled telephone cord, allowing the cell’s DNA to be packed into the nucleus. The two halves of a chromosome are called chromatids, or, more fully, sister-chromatids.Each sister-chromatid contains one molecule of DNA.The two DNA molecules of one chro … mosome are, barring occasional copying errors, genetically identical, because they were formed from the same original DNA molecule at the most recent replication.ach sister-chromatid contains one molecule of DNA. The two DNA molecules of one chro … mosome are, barring occasional copying errors, genetically identical, because they were formed from the same original DNA molecule at the most recent replication. Two unduplicated chromosomes Centromere Sister chromatids Sister chromatids Duplication Non-sisterchromatids Two duplicated chromosomes Structure of Chromosomes The centromere is a constricted region of the chromosome containing a specific DNA sequence, to which is bound 2 discs of protein called kinetochores.ach duplicated chromosome appears as two identical sister chromatids joined together. The mitotic spindle begins to form. It is composed of the centrosomes and the microtubules that extend from them. The radial arrays of shorter microtubules that extend from the centrosomes are called asters (“stars”). CHROMOSOMAL STRUCTURE. A chromatid is a condensed DNA subunit of a chromosome. The two chromatids of a duplicated chromosome are held together at a region of DNA called the centromere (see figure below).Centromeres are the attachment points for microtubules, which are responsible for the guiding the movement of chromosomes during mitosis and meiosis.hromosomes are packaged by histone proteins into a condensed structure called chromatin. The first level of packaging is represented as the “beads-on-a-string” structure. The condensed chromatin is folded and tightly coiled, like a coiled telephone cord, allowing the cell’s DNA to be packed into the nucleus. Because each duplicated chromosome consists of two identical sister chromatids joined at a point called the centromere, these structures now appear as X-shaped bodies when viewed under a microscope. Several DNA binding proteins catalyze the condensation process, including cohesin and condensin.itosis is the process in which a eukaryotic cell nucleus splits in two, followed by division of the parent cell into two daughter cells. The word mitosis means threads, and it refers to the threadlike appearance of chromosomes as the cell prepares to divide. 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. Sister chromatids (pronounced KRō-mə-tidz) are the two identical halves of a single replicated eukaryotic chromosome. They are joined at the centromere (see diagram at right) and genetically identical because, during interphase, they are produced from the two complementary strands of a single duplex DNA molecule (). single replicated chromosome has two sister chromatids. One chromatid is shown in yellow, the other in blue. The two chromatids contain exactly identical chains of double-stranded DNA, as well as a protein support structure composed of mostly of histones. Histones are proteins present in all eukaryotic cells. The duplicated chromosomes then attach to the spindle, align at the cell equator, and move apart as the spindle microtubules retreat toward opposite poles of the cell. Each set of chromosomes is then surrounded by a nuclear membrane, and the parent cell splits into two complete daughter cells.itosis is the process in which a eukaryotic cell nucleus splits in two, followed by division of the parent cell into two daughter cells. The word mitosis means threads, and it refers to the threadlike appearance of chromosomes as the cell prepares to divide. In this diagram of a duplicated chromosome, (2) identifies the centromere—the region that joins the two sister chromatids, or each half of the chromosome.he centromere (centro- + -mere) is the part of a chromosome that links sister chromatids. During mitosis, spindle fibers attach to the centromere via the kinetochore. Centromeres were first defined as genetic loci that direhromosomes. In prophase of mitosis, specialized regions on centromeres called kinetochores attach chromosomes to spindle fibers. The centromere (centro- + -mere) is the part of a chromosome that links sister chromatids. During mitosis, spindle fibers attach to the centromere via the kinetochore.Centromeres were first defined as genetic loci that direhromosomes.he centromere (centro- + -mere) is the part of a chromosome that links sister chromatids. During mitosis, spindle fibers attach to the centromere via the kinetochore. Centromeres were first defined as genetic loci that direhromosomes.
Chromatids