BSC 1005 Final Exam - Questions and Answers

BSC 1005 Final Exam - Questions and Answers Under the biological species concept, what criterion is used to assign populations of organisms to the same biological species? being able to interbreed and produce fertile offspring Speciation requires ______. genetic isolation The wing of a penguin is ______ the wing of a butterfly. analogous to Homology is evidence of ______. Common ancestry Feathers in birds appear to have first evolved for insulation but later conveyed a new advantage in helping create light aerodynamic surfaces. This switch in function is an example of ______. an exaptation Of the following taxonomic levels, species found within the same ______ are the most closely related. Family Peptide bonds form between ______. amino acids The DNA codon AGT codes for an amino acid carried by a tRNA with the anticodon ______. AGU Where is translation accomplished? Ribosomes RNA contains the nitrogenous base ______ instead of ______, which is only found in DNA. uracil... thymine The region of DNA where RNA synthesis begins is the ______. Promoter The RNA that is translated into a polypeptide is ______ RNA. messenger The recombination frequency between gene B and gene C is 11%. The recombination frequency between gene B and gene D is 5%. The recombination frequency between gene C and gene D is 15%. What would be the arrangement of these genes on a linkage map? DBC The best definition of a purebred plant is one that ______. self-fertilizes to produce offspring identical to the parent Hypophosphatemia (vitamin D-resistant rickets) is inherited as an sex-linked dominant trait. The relevant gene is found on the X chromosome. What is the expected outcome of a cross between a homozygous recessive woman and a man with hypophosphatemia? All of their daughters and none of their sons exhibit hypophosphatemia. In humans, the presence or absence of dimples is a trait controlled by a single gene. What is the genotype of an individual who is heterozygous for dimples? Dd What is the key to the recognition of incomplete dominance? The phenotype of the heterozygote falls between the phenotypes of the homozygotes. Which of these crosses will only produce heterozygous offspring? AA x aa One difference between mitosis and meiosis is ______ . mitosis produces cells genetically identical to the parent cell, but meiosis does not Which of the following is a characteristic seen in prophase I that does not occur in prophase II? Crossing over occurs. Crossing over during prophase I results in ______. genetic recombination Sister chromatids are joined at the ______. Centromere Ordinary cell division produces two daughter cells that are genetically identical. This type of cell division is important for all of the following functions EXCEPT production of sperm and eggs. Anaphase II is essentially the same as mitotic anaphase except that in anaphase II ______ and in mitotic anaphase ______. the cells are haploid and sister chromatids separate... the cells are diploid and sister chromatids separate