Genetics test 1 real

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kingbken
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Genetics test 1 real
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2011-12-16 06:15:04
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Genetics test 1 real
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  1. A chromosome with two arms of equal length is referred to as
    A. metacentric
    B. telocentric
    C. metazoan
    D. homologous
    E. acrocentric
    A. metacentric
    (this multiple choice question has been scrambled)
  2. If yellow and round phenotypes phenotypes in peas are dominant, you know the genotype of all peas that are green and wrinkled
    a. True
    b. False
    a. True
  3. Environmental conditions that allow conditional lethals to live are known as ____ conditions.
    A. living
    B. desirable
    C. restrictive
    D. permissive
    D. permissive
    (this multiple choice question has been scrambled)
  4. Which of the following ratios show incomplete dominance?
    A. 1:1
    B. 4:1
    C. 2:1
    D. 3:1
    E. 1:2:1
    E. 1:2:1
    (this multiple choice question has been scrambled)
  5. Monohybrid crosses helped reveal the Law of Independent Assortment.
    a. True
    b. False
    b. False
  6. The oldest known living organism on the planet are the
    A. prokaryotes
    B. yeasts
    C. plants
    D. nematodies
    E. eukaryotes
    A. prokaryotes
    (this multiple choice question has been scrambled)
  7. The ____ is a Mendelian law that states that both alleles must separate during gamete formation.
    A. Law of Independent Assortment
    B. Product Rule
    C. Law of Segregation
    D. Law of Probability
    C. Law of Segregation
    (this multiple choice question has been scrambled)
  8. What aspects of chromosome behavior most clearly accounts for Mendel's law of segregation?
    A. crossing over between homologous chromosomes during prophase I of meiosis
    B. movement of sister chromatids to opposite poles at anaphase II of meiosis
    C. movement of homologous chromosomes to opposite poles at anaphase I of meiosis
    D. independent alignment of different homologous pairs on the metaphase I spindle
    E. replication of chromosomes prior to meiosis
    C. movement of homologous chromosomes to opposite poles at anaphase I of meiosis
    (this multiple choice question has been scrambled)
  9. What does a diamond symbol (<>) on a pedigree chart indicate?
    A. unspecified gender
    B. female
    C. male
    d. None of the above.
    A. unspecified gender
    (this multiple choice question has been scrambled)
  10. An interaction between non-allelic genes that result in the masking of expression of a phenotype
    A. epigenetics
    B. epistasis
    C. incomplete dominance
    D. dominance
    E. codominance
    B. epistasis
    (this multiple choice question has been scrambled)
  11. A person who has type O blood has
    A. anti-A antibodies
    B. anti-AB antibodies
    C. both anti-A and anti-B antibodies
    D. anti-B antibodies
    C. both anti-A and anti-B antibodies
    (this multiple choice question has been scrambled)
  12. The stage of mitosis when chromosomes condense to form rod-shaped structures visible under the microscope is
    A. prophase
    B. anaphase
    C. interphase
    D. metaphase
    E. telophase
    A. prophase
    (this multiple choice question has been scrambled)
  13. During which of the following stages of the cell cycle would a chromosome consist of only a single chromatid?
    a. G1
    2. G2
    c. mitotic prophase
    d. mitotis metaphase
    e. All of the above
    a. G1
  14. An allele that expresses its phenotype even when heterozygous with a recessive allele is termed
    A. parental
    B. dominant
    C. independent
    D. recessive
    E. recombinant
    B. dominant
    (this multiple choice question has been scrambled)
  15. At which of the following stages of meiosis would homologous chromosomes be paired?
    A. metaphase of meiosis II
    B. metaphase of meiosis I
    C. prophase of meiosis I
    D. both prophase and metaphase of meiosis I
    E. prophase of meiosis II
    D. both prophase and metaphase of meiosis I
    (this multiple choice question has been scrambled)
  16. _____ is the process in which both egg and pollen come from the same plant.
    A. self-fertilization
    B. reciprocal crosses
    C. artificial selection
    D. cross fertilization
    A. self-fertilization
    (this multiple choice question has been scrambled)
  17. Currently, the estimated number of genes in the human genome is
    A. 10,000 to 20,000
    B. greater than 40,000
    C. 20,000 to 30,000
    D. 30,000 to 40,000
    E. 5,000 to 10,000
    C. 20,000 to 30,000
    (this multiple choice question has been scrambled)
  18. In some genetically enginerred corn plants the dominant gene (BT) produces a protein that is lethal to certain flying insect pests that eat the corn plants. It was also found that the pollen could cause death in some flying insects. If the corn plant is heterozygous for BT, what proportion of the pollen would carry the dominant gene?
    A. 1/8
    B. 1/3
    C. 1/2
    D. 1/4
    E. all pollen
    C. 1/2
    (this multiple choice question has been scrambled)
  19. In a monohybrid cross between an organism that is homozygous dominant and an organism that is homozygous recessive, what proportion of heterozygotes is expected among the F2 offspring?
    A. 1/2
    B. all are heterozygotes
    C. none are heterozygotes
    D. 3/4
    E. 1/4
    A. 1/2
    (this multiple choice question has been scrambled)
  20. Cross-fertilization is the same as reciprocal cross.
    a. True
    b. False
    b. False
  21. In which condition is neither gene fully expressed?
    A. incomplete dominance
    B. Epistatis
    C. codominance
    D. pleiotropy
    A. incomplete dominance
    (this multiple choice question has been scrambled)
  22. The first offspring from the parents are called
    A. P
    B. backcross
    C. F2
    D. testcross
    E. F1
    E. F1
    (this multiple choice question has been scrambled)
  23. In Drosophila virilis, nuclei of somatic cells contain 12 chromosomes while nuclei of sperm cells contain only 6 chromosomes. What does "n" equal for this species?
    A. 3
    B. 12
    C. 6 or 12, depending on cell type
    D. 6
    E. 24
    D. 6
    (this multiple choice question has been scrambled)
  24. Which of the following ratios indicates a recessive lethal gene?
    A. 4:1
    B. 3:1
    C. 2:1
    D. 1:1
    E. 1:2:1
    C. 2:1
    (this multiple choice question has been scrambled)
  25. The snapdragon flower colors white, pink, and red indicate codominant inheritance.
    a. True
    b. False
    b. False
  26. During which of the following stages of the cell cycle would a chromosome consist of only a single chromatid?
    A. G1
    B. G2
    C. mitotis prophase
    D. mitotic metaphase
    e. All of the above
    A. G1
    (this multiple choice question has been scrambled)
  27. An individual can be a heterozygote for one trait and a homozygote for another.
    a. True
    b. False
    a. True
  28. Blood type "AB" is an example of
    A. pleiotropy
    B. epitasis
    C. incomplete dominance
    D. codominance
    D. codominance
    (this multiple choice question has been scrambled)
  29. In codominance, F1 hybrids show the traits of both parents.
    a. True
    b. False
    a. True
  30. Which aspects of chromosome behavior is/are primarrily responsible for the tremendous amount of genetic variability associated with sexual reproduction?
    A. crossing over between homologous chromosomes during prophase I of meiosis
    B. independent alignment of different homologous pairs on the metaphase I spindle
    C. both crossing over between homologous chromosomes during prophase I of meiosis and independent alignment of different homologous pairs on the metaphase I spindle contribute to genetic variability
    D. segregation of sister chromatids at Anaphase II of meiosis
    E. segregation of homologous chromosomes at anaphase I of meiosis
    C. both crossing over between homologous chromosomes during prophase I of meiosis and independent alignment of different homologous pairs on the metaphase I spindle contribute to genetic variability
    (this multiple choice question has been scrambled)
  31. Which of the following was probably the first genetic material on earth?
    A. RNA
    B. carbohydrates
    C. DNA
    D. lipids
    E. proteins
    A. RNA
    (this multiple choice question has been scrambled)
  32. A _____ is a cross between an unknown and a homozygous recessive.
    A. testcross
    B. dihybrid
    C. controlled
    D. backcross
    E. monohybrid
    A. testcross
    (this multiple choice question has been scrambled)
  33. Cells in the G2 stage of the cell cycle have ____ as cells of the same species in the G1 stage.
    A. twice as many chromatids
    B. the same number of chromatids
    C. half as many chromatids
    D. twice as many chromosomes
    E. half as many chromosomes
    A. twice as many chromatids
    (this multiple choice question has been scrambled)
  34. _____,_____, and ____ were all involved in the rediscovery of Mendel's research.
    A. Erich bon Tschermak, Hugo de Vries, and Jacques Offenbach
    B. Charles Darin, Hugo Vries, and Erich von Tschermak
    C. Hugo de Vries, Erich von Tschermak, and Joseph Hayden
    D. Erich von Tschermak, Carl Correns, and Hugo de Vries
    D. Erich von Tschermak, Carl Correns, and Hugo de Vries
    (this multiple choice question has been scrambled)
  35. A YY or yy genotype is called heterozygous.
    a. True
    b. False
    b. False
  36. When a late blooming pea and an early blooming pea are crossed and an intermediate phenotype occurs, this result would suggest incomplete dominant inheritance.
    a. True
    b. False
    a. True
  37. Mitosis results in ____ chromosome number, whereas meiosis results in _____ chromosome number.
    A. no change in, no change in
    B. no change in, a reduction by half in
    C. a reduction by half in, no change in
    D. no change in, a doubling of
    E. a doubling of, no change in
    B. no change in, a reduction by half in
    (this multiple choice question has been scrambled)
  38. An alternative form of a single gene is known as
    A. reciprocal
    B. parental
    C. recessive
    D. allele
    E. dihybrid
    D. allele
    (this multiple choice question has been scrambled)
  39. A rare recessive trait in a pedigree is indicated by which pattern of inheritance?
    A. vertical
    B. both vertical and horizontal
    C. diagonal
    D. horizontal
    e. None of the above.
    D. horizontal
    (this multiple choice question has been scrambled)
  40. What aspect of chromosome behavior most clearly accounts for Mendel's law of independent assortment?
    A. crossing over between homologous chromosomes during prophase I of meiosis
    B. replication of chromosomes prior to meiosis
    C. independent alignment of different homologous pairs on the metaphase I spindle
    D. movement of sister chromatids to opposite poles at anaphase II of meiosis
    E. movement of homologous chromosomes to opposite poles at anaphase I of meiosis
    A. crossing over between homologous chromosomes during prophase I of meiosis
    (this multiple choice question has been scrambled)
  41. Duplications of the genes, followed by mutation, is responsible for the formation of
    A. gene families
    B. biological systems
    C. proteins
    D. chromosomes
    e. None of the above
    A. gene families
    (this multiple choice question has been scrambled)
  42. A zygotes is a fertilized egg.
    a. True
    b. False

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