Bio 2 - Unit 3 Test: Form A

60 Questions | Total Attempts: 78

SettingsSettingsSettings
Please wait...
Bio 2 - Unit 3 Test: Form A

.


Related Topics
Questions and Answers
  • 1. 
    If a pea plant were homozygous recessive for height, how would its alleles be represented?
    • A. 

      Tt

    • B. 

      TT

    • C. 

      Tt

    • D. 

      TT

  • 2. 
    Genes that are located on the sex chromosomes are called ___.
    • A. 

      Sex-linked

    • B. 

      Alleles

    • C. 

      Recessive

    • D. 

      XY

  • 3. 
    A plant that is homozygous for red flowers (rr) is crossed with a plants that is homozygous for white flowers (ww). In the case of incomplete dominance, the flowers of the offspring will be ___.
    • A. 

      Red and white

    • B. 

      White only

    • C. 

      Red only

    • D. 

      Pink only

  • 4. 
    The term for a cross that involves just one trait, such as flower color, is ___.
    • A. 

      A homozygous cross

    • B. 

      A test cross

    • C. 

      A monohybrid cross

    • D. 

      A dihybrid cross

  • 5. 
    When an organism has two alleles at a particular locus that are different, the organism is called
    • A. 

      Purebred

    • B. 

      Dominant

    • C. 

      Heterozygous

    • D. 

      Recessive

  • 6. 
    An allele is dominant in a heterozygote when it is
    • A. 

      Expressed and the other allele is not.

    • B. 

      A very common allele in the population.

    • C. 

      The weaker of the two alleles.

    • D. 

      More desirable than the other allele.

  • 7. 
    Hair color and eye color are examples of a person's
    • A. 

      Recessive traits.

    • B. 

      Dominant alleles.

    • C. 

      Genotype.

    • D. 

      Phenotype.

  • 8. 
    What do the letters inside the grid of a Punnett square represent?
    • A. 

      Phenotypes of parents

    • B. 

      Genotypes of offspring

    • C. 

      Test-crosses of offspring

    • D. 

      Chromosomes of parents

  • 9. 
    Which law states that organisms inherit two copies of each gene and donate one copy to each of their offspring?
    • A. 

      Law of genetic linkage

    • B. 

      Law of segregation

    • C. 

      Law of independent assortment

    • D. 

      Law of inheritance

  • 10. 
    Recessive alleles may not be expressed because they are
    • A. 

      Masked by the dominant allele.

    • B. 

      The least common allele in a population.

    • C. 

      The most common allele in a population.

    • D. 

      Harmful to the organism.

  • 11. 
    Mendel's second law of genetics, the law of independent assortment, is one explanation of the
    • A. 

      Random fertilization of gametes.

    • B. 

      Genetic variation within species.

    • C. 

      Greater strength of dominant alleles.

    • D. 

      Final stages of gametogenesis.

  • 12. 
    Two parents have the genotype Gg for a genetic disorder caused by a dominant allele. What is the chance that any of their children will inherit the disorder?
    • A. 

      25%

    • B. 

      50%

    • C. 

      75%

    • D. 

      100%

  • 13. 
    For an XX female to express a recessive sex-linked trait, she must have
    • A. 

      A Y chromosome.

    • B. 

      An inactivated allele.

    • C. 

      Two recessive alleles.

    • D. 

      Two dominant alleles.

  • 14. 
    A child is born with attached earlobes, which is a recessive phenotype. Which of the following genotypes could the parents have?
    • A. 

      RR and RR

    • B. 

      Rr and RR

    • C. 

      Rr and rr

    • D. 

      RR and rr

  • 15. 
    Given the DNA code in Problem 4 on your Test Form A,  what is the sequence of amino acids?
    • A. 

      Met-Thr-Leu

    • B. 

      Met-Thr-Asp

    • C. 

      Met-Pro-His

    • D. 

      Phe-Leu-Ala-Ala-Leu

  • 16. 
    Which pair of genes in Figure 6.2 would be most likely to be inherited together?
    • A. 

      A and B

    • B. 

      A and C

    • C. 

      B and C

    • D. 

      B and D

  • 17. 
    Any of the alternative forms of a gene that occurs at a specific place on a chromosome are known as ___.
    • A. 

      Alleles

    • B. 

      Genes

    • C. 

      Chromosomes

    • D. 

      Recessive traits

  • 18. 
    A chart or "family tree" that tracks which members of a family have a particular trait is called a ___.
    • A. 

      Pedigree

    • B. 

      Punnett square

    • C. 

      Genetic linkage

    • D. 

      DNA sequence

  • 19. 
    ___ studied traits of pea plants and discovered the two fundamental laws of genetics.
    • A. 

      Mendel

    • B. 

      Watson and Crick

    • C. 

      Mack

    • D. 

      Einstein

  • 20. 
    ___ is a pattern of inheritance in which one allele is not completely dominant over the other, thereby creating a blended phenotype.
    • A. 

      Incomplete dominance

    • B. 

      Co-dominance

    • C. 

      Multiple allele

    • D. 

      Sex-linked

  • 21. 
    ___ is a pattern of inheritance in which two alleles are equally dominant, thereby creating a blotchy phenotype.
    • A. 

      Incomplete dominance

    • B. 

      Co-dominance

    • C. 

      Multiple allele

    • D. 

      Sex-linked

  • 22. 
    ___ is a pattern of inheritance in which more than two alleles are possible, thereby creating a several possible genotypes and phenotypes.
    • A. 

      Incomplete dominance

    • B. 

      Co-dominance

    • C. 

      Multiple allele

    • D. 

      Sex-linked

  • 23. 
    ___ is a pattern of inheritance in which the gene for a trait is located on the X-chromosome, thereby creating disorders that are much more common in males than females.
    • A. 

      Incomplete dominance

    • B. 

      Co-dominance

    • C. 

      Multiple allele

    • D. 

      Sex-linked

  • 24. 
    The generation of offspring derived from the first filial generation is called the ___.
    • A. 

      F1 generation

    • B. 

      P generation

    • C. 

      F2 generation

    • D. 

      Generation X

  • 25. 
    A cross between organisms where two pairs of contrasting traits are studied and offspring probabilities are predicted is called a ___.
    • A. 

      Monohybrid cross

    • B. 

      Dihybrid cross

    • C. 

      Test cross

    • D. 

      Blue cross

  • 26. 
    Which of the following does not describe Metaphase I of meiosis?
    • A. 

      The homologous chromosomes line up in the middle of the cell.

    • B. 

      The homologous chromosomes pair up.

    • C. 

      A metaphase plate is present.

    • D. 

      Both copies of chromosome 4 line up on the same side.

  • 27. 
    In humans, a ___ cell has ___ chromosomes.
    • A. 

      Haploid ... 46

    • B. 

      Haploid ... 23

    • C. 

      Diploid ... 50

    • D. 

      Diploid ... 23

  • 28. 
    Homologous chromosomes exchange information from time to time through a process called crossing over. During which stage of meiosis does this occur?
    • A. 

      Prophase I

    • B. 

      Metaphase II

    • C. 

      Prophase II

    • D. 

      Telophase I

  • 29. 
    The cells in the ovaries and testes that actually go through meiosis to produce haploid cells are called ___.
    • A. 

      Germ cells

    • B. 

      Oocytes

    • C. 

      Spermatocytes

    • D. 

      Gametes

  • 30. 
    A form of nuclear division that divides a diploid cell into haploid cells and produces gametes is known as ___.
    • A. 

      Mitosis

    • B. 

      Meiosis

    • C. 

      Cellular regeneration

    • D. 

      Binary fission

  • 31. 
    A cell that has two copies of each chromosome is said to be ___.
    • A. 

      Diploid

    • B. 

      Haploid

    • C. 

      Triploid

    • D. 

      A gamete

  • 32. 
    The process by which two gametes fuse and offspring that are a genetic mixture of both parents are produced is called ___.
    • A. 

      Sexual reproduction

    • B. 

      Asexual reproduction

    • C. 

      Binary fission

    • D. 

      Sexual maturation

  • 33. 
    Chromosomes that have the same length, the same appearance, and the same gene loci are called ___.
    • A. 

      Homologous chromosomes

    • B. 

      Sex chromosomes

    • C. 

      Autosomes

    • D. 

      Chromosomal triploids

  • 34. 
    A female gamete ___.
    • A. 

      Is produced in the testes.

    • B. 

      Is called an ovum or an egg cell.

    • C. 

      Is called a spermatocyte.

    • D. 

      Is called a polar body.

  • 35. 
    Cells that have only one copy of an organisms chromosomes are said to be ___.
    • A. 

      Somatic cells

    • B. 

      Diploid cells

    • C. 

      Haploid cells

    • D. 

      Binary cells

  • 36. 
    Cells that are produced by germ cells through the process of meiosis are called ___.
    • A. 

      Somatic cells

    • B. 

      Gametes

    • C. 

      Diploid cells

    • D. 

      Binary cells

  • 37. 
    Cells that make up the body tissues and organs are called ___.
    • A. 

      Somatic cells

    • B. 

      Gametes

    • C. 

      Haploid cells

    • D. 

      Binary cells

  • 38. 
    A(n) ___ involves the insertion or deletion of a single base in a DNA molecule.
    • A. 

      Frameshift mutation

    • B. 

      Point mutation

    • C. 

      Translocation

    • D. 

      Mutagen

  • 39. 
    A(n) ___ involves the substitution of a single base in a DNA molecule.
    • A. 

      Frameshift mutation

    • B. 

      Point mutation

    • C. 

      Translocation

    • D. 

      Mutagen

  • 40. 
    The chromosome abnormality that occurs when part of one chromosome breaks off and is added to a different chromosome is ___.
    • A. 

      Deletion

    • B. 

      Nondisjunction

    • C. 

      Translocation

    • D. 

      Inversion

  • 41. 
    Each set of three nucleotides on mRNA coding for an amino acid is referred to as a(n) ___.
    • A. 

      Codon

    • B. 

      Anticodon

    • C. 

      Ribosome

    • D. 

      Base pair

  • 42. 
    Messenger RNA is formed in the process of ___.
    • A. 

      Transcription

    • B. 

      Translation

    • C. 

      Replication

    • D. 

      Mutation

  • 43. 
    The process by which a DNA molecule is copied is ___.
    • A. 

      Transcription

    • B. 

      Translation

    • C. 

      Replication

    • D. 

      Mutation

  • 44. 
    Watson and Crick, with the help of Rosalind Franklin, were the first to suggest that DNA is ___.
    • A. 

      A short molecule

    • B. 

      A protein molecule

    • C. 

      The shape of a double helix

    • D. 

      The genetic material

  • 45. 
    The nucleotide triplet on tRNA that complements a codon is called a(n) ___.
    • A. 

      Codon

    • B. 

      Anticodon

    • C. 

      Ribosome

    • D. 

      Base pair

  • 46. 
    Which DNA sequence produced an mRNA strand with the sequence AGUACA?
    • A. 

      UCAUGU

    • B. 

      TCATGT

    • C. 

      GUACAG

    • D. 

      CAGTAC

  • 47. 
    Which of the following statements about DNA and RNA is true?
    • A. 

      RNA is arranged in a double helix.

    • B. 

      The kinds of sugar in the nucleotides of DNA and RNA differ.

    • C. 

      DNA contains nitrogenous bases and phosphates, while RNA does not.

    • D. 

      DNA contains uracil, while RNA contains thymine.

  • 48. 
    What type of mutation has occured in this piece of DNA?                                Original sequence:   TACGCG                                Mutated sequence:   TCGCGT
    • A. 

      Deletion

    • B. 

      Insertion

    • C. 

      Substitution

    • D. 

      Translocation

  • 49. 
    What does the circle represent in this diagram of a nucleotide?
    • A. 

      Phosphate group

    • B. 

      Nitrogenous base

    • C. 

      Pentose sugar

    • D. 

      Adenine base

  • 50. 
    Which of the following is a pair of complementary bases?
    • A. 

      Cytosine and cytosine

    • B. 

      Thymine and adenine

    • C. 

      Adenine and guanine

    • D. 

      Thymine and ctyosine

  • 51. 
    On Test Form A Problem 1, what is the genotypic ratio?
    • A. 

      2:1

    • B. 

      2:2

    • C. 

      4:0

    • D. 

      1:2:1

  • 52. 
    On Test Form A Problem 1, what is the phenotypic ratio?
    • A. 

      2:1

    • B. 

      2:2

    • C. 

      4:0

    • D. 

      1:2:1

  • 53. 
    On Test Form A Problem 2, what is the probability of PPRR?
    • A. 

      1/16

    • B. 

      2/16

    • C. 

      4/16

    • D. 

      8/16

  • 54. 
    On Test Form A Problem 2, what is the probability of PpRR?
    • A. 

      1/16

    • B. 

      2/16

    • C. 

      4/16

    • D. 

      8/16

  • 55. 
    On Test Form A Problem 2, what is the probability of PpRr?
    • A. 

      1/16

    • B. 

      2/16

    • C. 

      4/16

    • D. 

      8/16

  • 56. 
    On Test Form A Problem 3, what is the genotype of person #1?
    • A. 

      HH

    • B. 

      Hh

    • C. 

      Hh

    • D. 

      H-

  • 57. 
    On Test Form A Problem 3, what is the genotype of person #4?
    • A. 

      HH

    • B. 

      Hh

    • C. 

      Hh

    • D. 

      H-

  • 58. 
    On Test Form A Problem 3, what is the genotype of person #8?
    • A. 

      HH

    • B. 

      Hh

    • C. 

      Hh

    • D. 

      H-

  • 59. 
    On Test Form A Problem 3, what is the genotype of person #10?
    • A. 

      HH

    • B. 

      Hh

    • C. 

      Hh

    • D. 

      H-

  • 60. 
    Given the DNA code in Problem 4 on your Test Form A,  what is the STOP codon on the mRNA?
    • A. 

      UGA

    • B. 

      UAG

    • C. 

      UAA

    • D. 

      AUG