The DNA and associated proteins of a eukaryotic chromosome are called Chromatin Chromatosome Nucleosome Ribosome
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- A cell from a human female has just undergone mitosis. For unknown reasons, the centromere of chromosome 7 failed to divide. Describe the chromosomal contents of the daughter cells.Discuss the levels of chromosomal organization with reference to the following terms: a. nucleotide b. DNA double helix c. histones d. nucleosomes e. chromatinVariations in Chromosome NumberAneuploidy Describe the process of nondisjunction and explain when it takes place during cell division.
- A colleague e-mails you saying that she has identified an interesting chromosome variation at 21q13. In discussing this discovery with a friend who is not a cytogeneticist, explain how you would describe this location, defining each term in the chromosome address 21q13.Define the following terms and their relationships to one another:A. interphase chromosomeB. mitotic chromosomeC. ChromatinD. heterochromatin e. histonesF. NucleosomeIn the eukaryotic nucleus during interphase, a strand of chromatin consisting of eight conserved histone proteins, and a short region of double-stranded DNA wrapped around them, is: A. properly referred to as the radial miniband B. properly referred to as the supersolenoid C. properly referred to as the chromosome D. properly referred to as the nucleosome E. properly referred to as the solenoid
- Chromosomal Basis of Heredity Eukaryotic chromosomes are thousands of times longer than a typical cell. Explain how chromosomes can fit inside a eukaryotic nucleus. How are chromosomes in eukaryotic cells packaged? Chromosome abnormalities can be structural or numerical. Enumerate at least 3 examples of each, giving the numerical or structural changes in the chromosomes.Less condensed region of an interplase chromosome that stains diffusely. Which one Beads on a string Heterochromatin Histone Euchromatin Octamer nucleosomeBacterial and eukaryotic chromosomes are very compact. Discuss theadvantages and disadvantages of a compact chromosomal structure.
- the chromosomes of a yellow fever mosquito (Aedes aegypti). The species has 6 chromosome number (2n=6). Using this illustration, draw a schematic diagram of the cell division (mitosis) of the mosquito.Obvious differences in the position of chromosome copies are clear during metaphase of mitosis and meiosis. How would you describe these changes?If the DNA of chromosome 1 is fully extended, it will exceed the diameter of the nucleus of a cell by about 15,000 times. Therefore, discuss how DNA is packaged into the cell.
