All chapters Test Bank - Genetics and Genomics in Nursing and Health Care, 2nd Edition (Beery,), Chapter 1-20

Test Bank - Genetics and Genomics in Nursing and Health Care, 2nd Edition (Beery,), Chapter 1-20 __A.__16. Which statement regarding chromosome structure or function is true? A. The chromatids of any single chromosome are known as “sister chromatids.” B. The genes located on the telomeres of chromosomes are identical to the genes in the centromeres. C. Immediately before the mitosis phase of cell division, the chromosomes of all somatic cells are haploid. D. A specific gene allele on one chromosome has a complementary allele on the other chromosome of a pair. __C.__17. Why does a person with normal chromosomes only have two alleles for any single gene trait? A. A minimum of two alleles is required for the expression of monogenic traits. B. When a dominant allele is paired with a recessive allele, only the dominant allele is expressed, and the recessive allele is silent. C. One allele for the monogenic trait is on the paternally derived chromosome, and the other allele is on the maternally derived chromosome. D. Expression of more than two alleles of any single-gene trait results in enhanced expression of recessive alleles and suppressed expression of dominant alleles. __C__ 18. Under what normal condition are genotype and phenotype always the same? A. Euploidy of alleles B. Aneuploidy of alleles C. Homozygosity of alleles D. Heterozygosity of alleles __D.__19. What would be the expected result of a drug that affected a particular tissue by causing new DNA to form with covalent bonds instead of hydrogen bonds? A. None of the cells in the affected tissue would be able to leave G 0 and enter the cell cycle. B. Replication of DNA would result in identical DNA strands instead of complementary strands. C. Mitosis of cells in the tissue would result in the production of three new daughter cells instead of just two. D. The new cells that formed within this tissue would not be able to complete the next round of mitosis successfully. __B.__20. How does the DNA enzyme topoisomerase contribute to DNA replication? A. Unwinds the double helix and separates the double-stranded DNA B. Creates a “nick” in the DNA supercoils, allowing them to straighten before replication C. Initiates DNA synthesis in multiple sites down the strand, making the process more efficient D. Connects and links the individual pieces of newly synthesized DNA to form a single strand __A.__21. Where is telomeric DNA located? A. At the tips of the p and q arms of chromosomes. B. In the mitochondria of all somatic cells C. Only in the germ cells (ova and sperm) D. Within the histones of the solenoid