Genetics BVHS

32 Questions | Total Attempts: 738

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Genetics BVHS

Questions and Answers
  • 1. 
    A heterozygous tall pea plant is crossed with a short plant. Tall (T) is dominant to short (t) plants. The probability that the offspring plant will be tall is:
    • A. 

      75%

    • B. 

      25%

    • C. 

      50%

    • D. 

      100%

  • 2. 
    Brown (B) is dominant over white (b) in foxes. A homozygous brown fox is crossed with a white fox. The probability that the fox offspring will be white?
    • A. 

      0

    • B. 

      25

    • C. 

      50

    • D. 

      100

  • 3. 
    A heterozygous tall (Tt) plant is crossed at with a short plant (tt). The probability that offspring plants will be tall is...
    • A. 

      25%

    • B. 

      50%

    • C. 

      75%

    • D. 

      100%

  • 4. 
    Organisms that have two different alleles for a particular trait are said to be...
    • A. 

      Hybird

    • B. 

      Homozygyous

    • C. 

      Heterozygous

    • D. 

      Dominant

  • 5. 
    In pepper plants, the allele for hot flavor (H) is dominant to the allele for mild flavor(h).  A farmer crosses a homozygous dominant plant with a recessive (mild) plant. What percentage of the offspring from this cross will have hot flavor?
    • A. 

      25%

    • B. 

      50%

    • C. 

      75%

    • D. 

      100%

  • 6. 
    Which four items are living things with D.N.A.?
    • A. 

      Water, tree, birds, soil

    • B. 

      Animals, people, plants, bacteria

    • C. 

      Desk, clouds, hair, yeast

    • D. 

      Cells, bacteria, metal, fertilizer

  • 7. 
    If two parents are heterozygous for a genetically inherited dominant trait, what is the probability that they will have a child together who has this trait in his or her phenotype?
    • A. 

      0%

    • B. 

      25%

    • C. 

      50%

    • D. 

      75%

    • E. 

      100%

  • 8. 
    If a woman is homozygous normal and her husband is heterozygous for a genetically inherited recessive disease and they decide to become parents, what is the probability that they will have a healthy child?
    • A. 

      1 of 4

    • B. 

      2 of 4

    • C. 

      3 of 4

    • D. 

      4 of 4

  • 9. 
    One cat carries heterozygous, long-haired traits (Ss), and its mate carries homozygous short-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having long hair.  
    • A. 

      0%

    • B. 

      25%

    • C. 

      50%

    • D. 

      75%

    • E. 

      100%

  • 10. 
    In a certain species of plant, the color purple (P) is dominant to the color white (p). What is the probability of an offspring being white if one parent is homologous dominant and the other homologyous recessive? Make a punnet square to determine the percentages.
    • A. 

      0%

    • B. 

      25%

    • C. 

      75%

    • D. 

      100%

  • 11. 
    The scientist often reffered to as the father of genetics.
    • A. 

      Albert Einstein

    • B. 

      Gregor Mendel

    • C. 

      Louis Pasteur

    • D. 

      Alexander Flemming

  • 12. 
    An example of a heterozygous genotype is...
    • A. 

      Tt

    • B. 

      Tt

    • C. 

      TT

    • D. 

      Tall

  • 13. 
    Blonde hair is an example of what?
    • A. 

      Phenotype

    • B. 

      Genotype

  • 14. 
    The scientific study of heredity is called...
    • A. 

      Meiosis

    • B. 

      Crossing Over

    • C. 

      Genetics

    • D. 

      Pollination

  • 15. 
    In a genotype for plant height, such as Tt, what does each letter represent?
    • A. 

      One genotype

    • B. 

      One gene

    • C. 

      One allele

    • D. 

      One gamete

  • 16. 
    In cats, yellow fur is dominant over white fur. A heterozygous cat is mated with a white cat. The genotypes of offspring that could occur are:
    • A. 

      YY and Yy

    • B. 

      Yy

    • C. 

      Yy and yy

    • D. 

      YY, Yy, and yy

  • 17. 
    If two people who are both carrier(heterozygous)  for a genetically inherited fatal recessive disease decide to become parents, what will be the odds that their children will also be carriers?
    • A. 

      1 of 4

    • B. 

      2 of 4

    • C. 

      3 of 4

    • D. 

      4 of 4

  • 18. 
    An individual is Aabb.  How many different gametes can this individual create?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 19. 
    A black rat is crossed with a brown rat.  They have 14 offspring (8 black, 6 brown).  What were the genotypes of the original rats?
    • A. 

      AA x aa

    • B. 

      Aa x Aa

    • C. 

      AA x Aa

    • D. 

      Aa x aa

  • 20. 
    In the process of a test-cross, a purple-flowered pea (dominant) is crossed with a white-flowered pea plant.  Only four offspring survive, 3 purple and 1 white.  What can you say about the genotypes of the purple and white plants?
    • A. 

      Probably AA/ aa

    • B. 

      Probably Aa/aa

    • C. 

      Definitely Aa/aa

    • D. 

      Possibly Aa/Aa

  • 21. 
    For eye color, brown is dominant and blue is recessive.What is the genotype for a blue-eye individual?
    • A. 

      Brown

    • B. 

      Blue

    • C. 

      Aa

    • D. 

      AA

    • E. 

      Aa

  • 22. 
    A yellow-podded pea plant is crossed with a yellow-podded pea plant.  Of their offspring, 398 have yellow pods and 122 have green pods. a.What were the likely genotypes of each parent?b.  What is the ratio for the offspring?
    • A. 

      AA x Aa; .72

    • B. 

      Aa x Aa; .72

    • C. 

      AA x Aa; 3.3: 1

    • D. 

      Aa x Aa; 3.3:1

  • 23. 
    AaBb X aaBb (A =brown eyes, a= blue; B= long tail, b=short tail) fraction with blue eyes, long tail.?
    • A. 

      0/16

    • B. 

      1/16

    • C. 

      3/16

    • D. 

      6/16

    • E. 

      8/16

    • F. 

      9/16

  • 24. 
    Any individual is AaBB.List all the unique gametes this individual can produce.
    • A. 

      Aa; BB

    • B. 

      A; a; B

    • C. 

      AB; aB; Ab; ab

    • D. 

      AB; aB

  • 25. 
    Aabb X aaBb (A =brown eyes, a= blue; B= long tail, b=short tail)  a. % with blue eye, short tail.  b.  % with brown eyes, short tail.
    • A. 

      0%; 50%

    • B. 

      0%; 100%

    • C. 

      25%; 75%

    • D. 

      25%; 25%

    • E. 

      25%; 50%

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