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1) The origin of the deltoid is (the) A) clavicle.  B) Scapula.  C) humerus.  D) Vertebral column.  E) Both A and B.  2) The supraspinatus and infraspinatus muscles are both innervated by (the) A) suprascapular nerve.  B) musculocutaneous nerve.  C) Axillary nerve.  D) thoracodorsal nerve.  E) None of the above.  […]

Assume that mammalian cells are grown in culture in the presence of fluorescent nucleotides for several generations so that all of the DNA in all of the chromosomes is fluorescent. When these cells are examined under a microscope, all of the chromosomes in the nucleus glow. If one of these […]

Part -1: Matching: Match the phase of the cell cycle to its description and write the correct word. Some will be used more than once. G1        S          G2        G0        Prophase                     Prometaphase             Metaphase      Anaphase                    Telophase                    Cytokinesis ____________________1.          Chromosomes are replicated. S ____________________2.          The cytoplasm is divided. Cytokinesis ____________________3.          Chromosomes “relax” […]

Generally, aneuploidies are caused by the impaired assortment of chromosomes during meiosis. For example, they are caused when the homologous chromosomes of pair 21 do not separate and, therefore, gametes with two chromosomes 21 and gametes without chromosomes 21 are formed. If a gamete with two chromosomes 21 fertilizes a […]