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of 127 available terms
(4 exact duplicates found)

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5 Written questions

5 Matching questions

  1. DNA clone:
  2. tester
  3. property
  4. self
  5. tetrad
  1. a (1) Four homologous chromatids in a bundle in the first meiotic prophase and metaphase. (2) The four haploid product cells from a single meiosis.
  2. b A characteristic feature of an organism, such as size, color, shape, or enzyme activity.
  3. c To fertilize eggs with sperms from the same individual.
  4. d A section of DNA that has been inserted into a vector molecule, such as a plasmid or a phage, and then replicated to produce many copies.
  5. e An individual organism homozygous for one or more recessive alleles; used in a testcross.

5 Multiple choice questions

  1. The classical approach to genetic analysis, in which genes are first identified by mutant alleles and mutant phenotypes and later cloned and subjected to molecular analysis.
  2. An individual organism having a heterozygous gene pair.
  3. A class of RNA molecules, encoded in the nucleolar organizer, that have an integral (but poorly understood) role in ribosome structure and function.
  4. A set of correspondences between nucleotide triplets in RNA and amino acids in protein.
  5. An experimental procedure that begins with a cloned segment of DNA or a protein sequence and uses it (through directed mutagenesis) to introduce programmed mutations back into the genome to investigate function.

5 True/False questions

  1. polygene (quantitative trait locus)The study of the molecular processes underlying gene structure and function


  2. sex chromosomeOne of a pair of sex chromosomes, distinguished from the X chromosome.


  3. crossTwo successive nuclear divisions (with corresponding cell divisions) that produce gametes (in animals) or sexual spores (in plants and fungi) that have one-half of the genetic material of the original cell.


  4. heterogametic sexThe sex that has heteromorphic sex chromosomes (e.g., XY) and hence produces two different kinds of gametes with respect to the sex chromosomes.


  5. testcrossA cross of an individual organism of unknown genotype or a heterozygote (or a multiple heterozygote) with a tester.