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- Cells contain genetic information Which of the following sentences describes how genetic information is organized and used? O Genes in DNA molecules encode directions for chromosomes: O Chromosomes are organized into strands of RNA O Genes in DNA molecules encode directions for protein production A single gene is composed of multiple chromosomespuey drganlsm yo are working with has the following chromosomes. Place the chromosomes of this organism onto the cell below such that the diagram accurately shows a cell from this organism in metaphase of mitosis. Note 1: Only place chromosomes you need. You don't need them all. Note 2: You can place the 'Blank Box' image if you don't think you need a chromosome at a particular position. Dashed line - the metaphase plate 1.Copyright 2006 Nature Publishing Group Nature Reviews | Genetics Copyright © 2006 Nature Publishing Group Nature Reviews | Genetics The microscope image above shows the human chromosomes from a white blood cell. To create the image, researchers put cells in culture under conditions that encourage the cells to divide. They bathed the cells in a hypotonic (low salt) solution, which caused the cells to swell until their plasma membrane burst open. They "squashed" the chromosomes to spread them out, and stained them with a dye to make them visible under the microscope. Human chromosomes are numbered from longest (1) to shortest (22) plus the sex chromosomes X and Y. In the image chromosome 1 is about 7 micrometers. Answer the following questions. 1) What word(s) in the description above indicates that the chromosomes are not from a cell undergoing meiosis? 2) Based on the size, shape and appearance of the chromosomes in the image, in what cell cycle stage was the cell that the chromosomes…
- Chromosomes pass genetic information from one cell to another in cell generation. (j) Explain the relationship between DNA, genes, and chromosomes during the passing of genetic information. (k) During the passing of genetic information from one generation to the next via chromosomes, nondisjunction can occur, interrupting the process. Describe the events that take place during nondisjunction.Approximately what percentage of DNA is noncoding? a 98% b 2% c 50% d 25%All of the following statements regarding nucleosomes are true EXCEPT A each bead-like structure contains 8 molecules of histones H1, H2A, H2B, H3 and H4 the bead like structures are made up of core histones wrapped around by the DNA strands the histone proteins in the nucleosomes contain positively charged amino acids that interact with the negatively charged DNA D the bead like structures are linked to each other by the DNA chain
- How many number of histone proteins present in a nucleosome? 4 6 9. 8The structure that gives terminal : stability of chromosomes is Kintochore O Centromere and telomeres Centromere O telomere OBackground: DNA nucleotides (i.e A, T, G, and C) are naturally found in a paired, or bonded, arrangement (i.e. the double helix) within the nucleus of every cell. This structure makes the process of replication that occurs prior to mitosis and meiosis very reliable. The purpose of DNA, though, is not simply to make copies of itself, but to provide a set of instructions for the synthesis or "construction" of biomolecules, such as proteins. Why is transcription (i.e. the formation of an RNA copy of a given gene) a necessary step in the "construction" process highlighted above? What is the cell looking to ultimately do with this RNA information?
- 6 Genome Restructuring and Evolution39 The structures labelled A and B in the image below represent: СТАААТСGGT. Allele for red flowers B Enzyme A Allele for white flowers One allele sufficient to ATAAATCGGT produce half the pigment Select one alternative: O the locus for flower colour; a red flower the locus for flower colour; a white flower O non-homologous chromosomes; a red flower O homologous chromosomes; a pink flowerWhich of the following statements accurately describes the usual structure of a eukaryotic chromosome? Select one: O It is constructed as a series of nucleosomes wrapped around two DNA molecules. O It is composed of a single strand of DNA. O It is a single linear molecule of double-stranded DNA plus proteins. O It has different numbers of genes in different cell types of an organism.
